diff --git a/packages/frontend-misskey-world-engine/src/EngineBase.ts b/packages/frontend-misskey-world-engine/src/EngineBase.ts
index 772ecdf557..173d16f68f 100644
--- a/packages/frontend-misskey-world-engine/src/EngineBase.ts
+++ b/packages/frontend-misskey-world-engine/src/EngineBase.ts
@@ -5,9 +5,6 @@
 
 import * as BABYLON from '@babylonjs/core/pure.js';
 import EventEmitter from 'eventemitter3';
-import { PlayerContainer, type PlayerProfile, type PlayerState } from './PlayerContainer.js';
-
-// TODO: multiplayer関連は全ての子クラスで必要とは限らない(preview用など)ため、このクラスを継承する別のabstract classに分離
 
 const IN_WEB_WORKER = typeof window === 'undefined';
 
@@ -29,11 +26,6 @@ export abstract class EngineBase<EVs extends EngineBaseEvents> extends EventEmit
 	protected fps: number | null = null;
 	protected disposed = false;
 
-	protected playerProfiles: Record<string, PlayerProfile> = {};
-	protected playerContainers: PlayerContainer[] = [];
-	protected showUsernameOnAvatar: boolean;
-	protected show2dAvatarOnAvatar: boolean;
-
 	public inputs: EventEmitter<{
 		'click': (event: { x: number; y: number; }) => void;
 		'keydown': (event: { code: string; shiftKey: boolean; }) => void;
@@ -123,105 +115,6 @@ export abstract class EngineBase<EVs extends EngineBaseEvents> extends EventEmit
 
 	public abstract resize(): void;
 
-	public updatePlayerProfiles(profiles: Record<string, PlayerProfile>) {
-		this.playerProfiles = profiles;
-
-		for (const playerContainer of this.playerContainers) {
-			if (this.playerProfiles[playerContainer.id] == null) {
-				this.sr.disableSnapshotRendering();
-				playerContainer.destroy();
-				this.sr.enableSnapshotRendering();
-			}
-		}
-		this.playerContainers = this.playerContainers.filter(p => this.playerProfiles[p.id] != null);
-	}
-
-	public updatePlayerStates(states: Record<string, PlayerState>) {
-		for (const [k, v] of Object.entries(this.playerProfiles)) {
-			const playerContainer = this.playerContainers.find(p => p.id === k);
-			if (playerContainer == null) {
-				const p = new PlayerContainer({
-					id: k,
-					profile: v,
-					state: states[k],
-					scene: this.scene,
-					sr: this.sr,
-					showUsername: this.showUsernameOnAvatar,
-					show2dAvatar: this.show2dAvatarOnAvatar,
-				});
-				// TODO: loadFurnitureのものとある程度共通化
-				p.registerMeshes = (meshes) => {
-					for (const mesh of meshes) {
-						mesh.receiveShadows = false;
-						mesh.metadata = { isPlayer: true, playerId: k };
-
-						//if (mesh.material) (mesh.material as BABYLON.PBRMaterial).ambientColor = new BABYLON.Color3(0.2, 0.2, 0.2);
-						if (mesh.material) {
-							if (mesh.material instanceof BABYLON.MultiMaterial) {
-								for (const subMat of mesh.material.subMaterials) {
-									if ((subMat as BABYLON.PBRMaterial).subSurface.isRefractionEnabled) {
-										(subMat as BABYLON.PBRMaterial).subSurface.isRefractionEnabled = false; // 有効にするとドローコールが激増する
-										(subMat as BABYLON.PBRMaterial).transparencyMode = BABYLON.PBRMaterial.PBRMATERIAL_ALPHABLEND;
-										(subMat as BABYLON.PBRMaterial).alpha = 0.5;
-										(subMat as BABYLON.PBRMaterial).metallic = 1;
-									}
-									(subMat as BABYLON.PBRMaterial).reflectionTexture = this.getEnvMap();
-									if ((subMat as BABYLON.PBRMaterial).metadata == null) (subMat as BABYLON.PBRMaterial).metadata = {};
-									(subMat as BABYLON.PBRMaterial).metadata.useEnvMap = true;
-									(subMat as BABYLON.PBRMaterial).useGLTFLightFalloff = true; // Clustered Lightingではphysical falloffを持つマテリアルはアーチファクトが発生する https://doc.babylonjs.com/features/featuresDeepDive/lights/clusteredLighting/#materials-with-a-physical-falloff-may-cause-artefacts
-									(subMat as BABYLON.PBRMaterial).anisotropy.isEnabled = false; // なんかきれいにレンダリングされないため
-								}
-							} else {
-								if ((mesh.material as BABYLON.PBRMaterial).subSurface.isRefractionEnabled) {
-									(mesh.material as BABYLON.PBRMaterial).subSurface.isRefractionEnabled = false; // 有効にするとドローコールが激増する
-									(mesh.material as BABYLON.PBRMaterial).transparencyMode = BABYLON.PBRMaterial.PBRMATERIAL_ALPHABLEND;
-									(mesh.material as BABYLON.PBRMaterial).alpha = 0.5;
-									(mesh.material as BABYLON.PBRMaterial).metallic = 1;
-								}
-								(mesh.material as BABYLON.PBRMaterial).reflectionTexture = this.getEnvMap();
-								if ((mesh.material as BABYLON.PBRMaterial).metadata == null) (mesh.material as BABYLON.PBRMaterial).metadata = {};
-								(mesh.material as BABYLON.PBRMaterial).metadata.useEnvMap = true;
-								(mesh.material as BABYLON.PBRMaterial).useGLTFLightFalloff = true; // Clustered Lightingではphysical falloffを持つマテリアルはアーチファクトが発生する https://doc.babylonjs.com/features/featuresDeepDive/lights/clusteredLighting/#materials-with-a-physical-falloff-may-cause-artefacts
-								(mesh.material as BABYLON.PBRMaterial).anisotropy.isEnabled = false; // なんかきれいにレンダリングされないため
-							}
-						}
-
-						if (!this.scene.meshes.includes(mesh)) this.scene.addMesh(mesh);
-					}
-				};
-				p.loadAvatar().then(() => {
-					this.sr.disableSnapshotRendering();
-					this.sr.enableSnapshotRendering();
-				});
-				this.playerContainers.push(p);
-			} else {
-				if (states[k] != null) {
-					playerContainer.applyState(states[k]);
-				}
-			}
-		}
-	}
-
-	public clearPlayers() {
-		this.sr.disableSnapshotRendering();
-		for (const playerContainer of this.playerContainers) {
-			playerContainer.destroy();
-		}
-		this.sr.enableSnapshotRendering();
-		this.playerContainers = [];
-	}
-
-	public updateAvatarDisplayOptions(options: { showUsername: boolean; show2dAvatar: boolean }) {
-		this.showUsernameOnAvatar = options.showUsername;
-		this.show2dAvatarOnAvatar = options.show2dAvatar;
-
-		this.sr.disableSnapshotRendering();
-		for (const playerContainer of this.playerContainers) {
-			playerContainer.updateUserInfoDisplayOptions(options);
-		}
-		this.sr.enableSnapshotRendering();
-	}
-
 	public destroy() {
 		this.babylonEngine.stopRenderLoop();
 		if (this.currentRafId != null) {
@@ -229,9 +122,6 @@ export abstract class EngineBase<EVs extends EngineBaseEvents> extends EventEmit
 			cancelAnimationFrame(this.currentRafId);
 			this.currentRafId = null;
 		}
-		for (const playerContainer of this.playerContainers) {
-			playerContainer.destroy();
-		}
 		this.babylonEngine.dispose();
 		this.scene.dispose();
 		this.disposed = true;
diff --git a/packages/frontend-misskey-world-engine/src/MultiplayEngineBase.ts b/packages/frontend-misskey-world-engine/src/MultiplayEngineBase.ts
new file mode 100644
index 0000000000..928acdf8c4
--- /dev/null
+++ b/packages/frontend-misskey-world-engine/src/MultiplayEngineBase.ts
@@ -0,0 +1,143 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as BABYLON from '@babylonjs/core/pure.js';
+import { EngineBase } from './EngineBase.js';
+import { PlayerContainer, type PlayerProfile, type PlayerState } from './PlayerContainer.js';
+
+const IN_WEB_WORKER = typeof window === 'undefined';
+
+export type MultiplayEngineBaseEvents = {
+	'loadingProgress': (ctx: { progress: number }) => void;
+	'contextlost': (ctx: { reason: string; message: string; }) => void;
+};
+
+export abstract class MultiplayEngineBase<EVs extends MultiplayEngineBaseEvents> extends EngineBase<EVs> {
+	protected playerProfiles: Record<string, PlayerProfile> = {};
+	protected playerContainers: PlayerContainer[] = [];
+	protected showUsernameOnAvatar: boolean;
+	protected show2dAvatarOnAvatar: boolean;
+
+	constructor(options: {
+		babylonEngine: BABYLON.WebGPUEngine;
+		fps: number | null;
+		showUsernameOnAvatar: boolean;
+		show2dAvatarOnAvatar: boolean;
+	}) {
+		super({
+			babylonEngine: options.babylonEngine,
+			fps: options.fps,
+		});
+
+		this.showUsernameOnAvatar = options.showUsernameOnAvatar;
+		this.show2dAvatarOnAvatar = options.show2dAvatarOnAvatar;
+	}
+
+	public updatePlayerProfiles(profiles: Record<string, PlayerProfile>) {
+		this.playerProfiles = profiles;
+
+		for (const playerContainer of this.playerContainers) {
+			if (this.playerProfiles[playerContainer.id] == null) {
+				this.sr.disableSnapshotRendering();
+				playerContainer.destroy();
+				this.sr.enableSnapshotRendering();
+			}
+		}
+		this.playerContainers = this.playerContainers.filter(p => this.playerProfiles[p.id] != null);
+	}
+
+	public updatePlayerStates(states: Record<string, PlayerState>) {
+		for (const [k, v] of Object.entries(this.playerProfiles)) {
+			const playerContainer = this.playerContainers.find(p => p.id === k);
+			if (playerContainer == null) {
+				const p = new PlayerContainer({
+					id: k,
+					profile: v,
+					state: states[k],
+					scene: this.scene,
+					sr: this.sr,
+					showUsername: this.showUsernameOnAvatar,
+					show2dAvatar: this.show2dAvatarOnAvatar,
+				});
+				// TODO: loadFurnitureのものとある程度共通化
+				p.registerMeshes = (meshes) => {
+					for (const mesh of meshes) {
+						mesh.receiveShadows = false;
+						mesh.metadata = { isPlayer: true, playerId: k };
+
+						//if (mesh.material) (mesh.material as BABYLON.PBRMaterial).ambientColor = new BABYLON.Color3(0.2, 0.2, 0.2);
+						if (mesh.material) {
+							if (mesh.material instanceof BABYLON.MultiMaterial) {
+								for (const subMat of mesh.material.subMaterials) {
+									if ((subMat as BABYLON.PBRMaterial).subSurface.isRefractionEnabled) {
+										(subMat as BABYLON.PBRMaterial).subSurface.isRefractionEnabled = false; // 有効にするとドローコールが激増する
+										(subMat as BABYLON.PBRMaterial).transparencyMode = BABYLON.PBRMaterial.PBRMATERIAL_ALPHABLEND;
+										(subMat as BABYLON.PBRMaterial).alpha = 0.5;
+										(subMat as BABYLON.PBRMaterial).metallic = 1;
+									}
+									(subMat as BABYLON.PBRMaterial).reflectionTexture = this.getEnvMap();
+									if ((subMat as BABYLON.PBRMaterial).metadata == null) (subMat as BABYLON.PBRMaterial).metadata = {};
+									(subMat as BABYLON.PBRMaterial).metadata.useEnvMap = true;
+									(subMat as BABYLON.PBRMaterial).useGLTFLightFalloff = true; // Clustered Lightingではphysical falloffを持つマテリアルはアーチファクトが発生する https://doc.babylonjs.com/features/featuresDeepDive/lights/clusteredLighting/#materials-with-a-physical-falloff-may-cause-artefacts
+									(subMat as BABYLON.PBRMaterial).anisotropy.isEnabled = false; // なんかきれいにレンダリングされないため
+								}
+							} else {
+								if ((mesh.material as BABYLON.PBRMaterial).subSurface.isRefractionEnabled) {
+									(mesh.material as BABYLON.PBRMaterial).subSurface.isRefractionEnabled = false; // 有効にするとドローコールが激増する
+									(mesh.material as BABYLON.PBRMaterial).transparencyMode = BABYLON.PBRMaterial.PBRMATERIAL_ALPHABLEND;
+									(mesh.material as BABYLON.PBRMaterial).alpha = 0.5;
+									(mesh.material as BABYLON.PBRMaterial).metallic = 1;
+								}
+								(mesh.material as BABYLON.PBRMaterial).reflectionTexture = this.getEnvMap();
+								if ((mesh.material as BABYLON.PBRMaterial).metadata == null) (mesh.material as BABYLON.PBRMaterial).metadata = {};
+								(mesh.material as BABYLON.PBRMaterial).metadata.useEnvMap = true;
+								(mesh.material as BABYLON.PBRMaterial).useGLTFLightFalloff = true; // Clustered Lightingではphysical falloffを持つマテリアルはアーチファクトが発生する https://doc.babylonjs.com/features/featuresDeepDive/lights/clusteredLighting/#materials-with-a-physical-falloff-may-cause-artefacts
+								(mesh.material as BABYLON.PBRMaterial).anisotropy.isEnabled = false; // なんかきれいにレンダリングされないため
+							}
+						}
+
+						if (!this.scene.meshes.includes(mesh)) this.scene.addMesh(mesh);
+					}
+				};
+				p.loadAvatar().then(() => {
+					this.sr.disableSnapshotRendering();
+					this.sr.enableSnapshotRendering();
+				});
+				this.playerContainers.push(p);
+			} else {
+				if (states[k] != null) {
+					playerContainer.applyState(states[k]);
+				}
+			}
+		}
+	}
+
+	public clearPlayers() {
+		this.sr.disableSnapshotRendering();
+		for (const playerContainer of this.playerContainers) {
+			playerContainer.destroy();
+		}
+		this.sr.enableSnapshotRendering();
+		this.playerContainers = [];
+	}
+
+	public updateAvatarDisplayOptions(options: { showUsername: boolean; show2dAvatar: boolean }) {
+		this.showUsernameOnAvatar = options.showUsername;
+		this.show2dAvatarOnAvatar = options.show2dAvatar;
+
+		this.sr.disableSnapshotRendering();
+		for (const playerContainer of this.playerContainers) {
+			playerContainer.updateUserInfoDisplayOptions(options);
+		}
+		this.sr.enableSnapshotRendering();
+	}
+
+	public destroy() {
+		for (const playerContainer of this.playerContainers) {
+			playerContainer.destroy();
+		}
+		super.destroy();
+	}
+}
diff --git a/packages/frontend-misskey-world-engine/src/engine.ts b/packages/frontend-misskey-world-engine/src/engine.ts
index 6e0834de99..b052569a55 100644
--- a/packages/frontend-misskey-world-engine/src/engine.ts
+++ b/packages/frontend-misskey-world-engine/src/engine.ts
@@ -8,14 +8,14 @@ import { registerBuiltInLoaders } from '@babylonjs/loaders/dynamic.js';
 import { cm, WORLD_SCALE } from 'misskey-world/src/utility.js';
 import { FreeCameraManualInput, GRAPHICS_QUALITY, Timer } from './utility.js';
 import { TIME_MAP } from './utility.js';
-import { EngineBase } from './EngineBase.js';
+import { MultiplayEngineBase } from './MultiplayEngineBase.js';
 import { LobbyEnvManager } from './envs/lobby.js';
 import type { PlayerContainer, PlayerProfile, PlayerState } from './PlayerContainer.js';
 import type { WorldEnvManager } from './env.js';
 
 const IN_WEB_WORKER = typeof window === 'undefined';
 
-export class WorldEngine extends EngineBase<{
+export class WorldEngine extends MultiplayEngineBase<{
 	'changeMyPlayerState': (ctx: PlayerState) => void;
 	'playerPointed': (ctx: { playerId: string; }) => void;
 	'playSfxUrl': (ctx: {
diff --git a/packages/frontend-misskey-world-engine/src/room/engine.ts b/packages/frontend-misskey-world-engine/src/room/engine.ts
index 0089ce2041..8f17a28d3e 100644
--- a/packages/frontend-misskey-world-engine/src/room/engine.ts
+++ b/packages/frontend-misskey-world-engine/src/room/engine.ts
@@ -22,7 +22,7 @@ import * as BABYLON from '@babylonjs/core/pure.js';
 import { registerBuiltInLoaders } from '@babylonjs/loaders/dynamic.js';
 import { cm, WORLD_SCALE } from 'misskey-world/src/utility.js';
 import { TIME_MAP, getMeshesBoundingBox, Timer, getYRotationDirection, FreeCameraManualInput, remap, GRAPHICS_QUALITY } from '../utility.js';
-import { EngineBase } from '../EngineBase.js';
+import { MultiplayEngineBase } from '../MultiplayEngineBase.js';
 import { genId } from '../id.js';
 import { deepClone } from '../clone.js';
 import { PlayerContainer, type PlayerProfile, type PlayerState } from '../PlayerContainer.js';
@@ -63,7 +63,7 @@ function intersectBoundingBoxes(bb1: { min: BABYLON.Vector3; max: BABYLON.Vector
 	return true;
 }
 
-export class RoomEngine extends EngineBase<{
+export class RoomEngine extends MultiplayEngineBase<{
 	'changeSelectedState': (ctx: {
 		selected: {
 			furnitureId: string;
diff --git a/packages/frontend/src/components/MkVirtualJoystick.vue b/packages/frontend/src/components/MkVirtualJoystick.vue
index 7309e2415e..597aad211c 100644
--- a/packages/frontend/src/components/MkVirtualJoystick.vue
+++ b/packages/frontend/src/components/MkVirtualJoystick.vue
@@ -12,7 +12,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <script lang="ts" setup>
 import { onMounted, ref, useTemplateRef } from 'vue';
-import { Joystick } from '@/world/joystick.js';
+import { Joystick } from '@/world/Joystick.js';
 
 const emit = defineEmits<{
 	(ev: 'update', vector: { x: number; y: number; }): void;
diff --git a/packages/frontend/src/pages/rooms/room.core.vue b/packages/frontend/src/pages/rooms/room.core.vue
index 4864f5c2c5..d419917671 100644
--- a/packages/frontend/src/pages/rooms/room.core.vue
+++ b/packages/frontend/src/pages/rooms/room.core.vue
@@ -189,7 +189,7 @@ import { prefer } from '@/preferences.js';
 import { misskeyApi } from '@/utility/misskey-api.js';
 import { miLocalStorage } from '@/local-storage.js';
 import { FURNITURE_UI_DEFS } from '@/world/room/furniture-ui-defs.js';
-import { Multiplayer } from '@/world/multiplayer.js';
+import { Multiplayer } from '@/world/Multiplayer.js';
 import { $i } from '@/i.js';
 import { userPage } from '@/filters/user.js';
 import MkUserCardMini from '@/components/MkUserCardMini.vue';
diff --git a/packages/frontend/src/pages/world.vue b/packages/frontend/src/pages/world.vue
index 83850fe071..26ba0f81b9 100644
--- a/packages/frontend/src/pages/world.vue
+++ b/packages/frontend/src/pages/world.vue
@@ -85,7 +85,7 @@ import { prefer } from '@/preferences.js';
 import { isTouchUsing } from '@/utility/touch.js';
 import { deviceKind } from '@/utility/device-kind.js';
 import MkProgressBar from '@/components/MkProgressBar.vue';
-import { Multiplayer } from '@/world/multiplayer.js';
+import { Multiplayer } from '@/world/Multiplayer.js';
 import { $i } from '@/i.js';
 import { userPage } from '@/filters/user.js';
 import MkUserCardMini from '@/components/MkUserCardMini.vue';
diff --git a/packages/frontend/src/world/MultiplayerEngineControllerBase.ts b/packages/frontend/src/world/MultiplayerEngineControllerBase.ts
new file mode 100644
index 0000000000..c9c1c94913
--- /dev/null
+++ b/packages/frontend/src/world/MultiplayerEngineControllerBase.ts
@@ -0,0 +1,52 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { shallowRef } from 'vue';
+import { EngineControllerBase } from './EngineControllerBase.js';
+import type { PlayerProfile, PlayerState } from 'misskey-world-engine/src/PlayerContainer.js';
+import type { MultiplayEngineBase, MultiplayEngineBaseEvents } from 'misskey-world-engine/src/MultiplayEngineBase.js';
+
+export type MultiplayerEngineControllerBaseOptions = {
+	workerMode?: boolean;
+	graphicsQuality: number;
+	fps: number | null;
+	resolution: number;
+	antialias: boolean;
+};
+
+export abstract class MultiplayerEngineControllerBase<T extends MultiplayEngineBase<MultiplayEngineBaseEvents>> extends EngineControllerBase<T> {
+	public myPlayerState = shallowRef<PlayerState>({
+		position: [0, 0, 0],
+		rotation: [0, 0, 0],
+	});
+
+	public sit() {
+		this.call('sit');
+	}
+
+	public lyingDown() {
+		this.call('lyingDown');
+	}
+
+	public standUp() {
+		this.call('standUp');
+	}
+
+	public updatePlayerProfiles(profiles: Record<string, PlayerProfile>) {
+		this.call('updatePlayerProfiles', [profiles]);
+	}
+
+	public updatePlayerStates(states: Record<string, PlayerState>) {
+		this.call('updatePlayerStates', [states]);
+	}
+
+	public clearPlayers() {
+		this.call('clearPlayers');
+	}
+
+	public updateAvatarDisplayOptions(options: { showUsername: boolean; show2dAvatar: boolean }) {
+		this.call('updateAvatarDisplayOptions', [options]);
+	}
+}
diff --git a/packages/frontend/src/world/Wasd.ts b/packages/frontend/src/world/Wasd.ts
new file mode 100644
index 0000000000..033d04a579
--- /dev/null
+++ b/packages/frontend/src/world/Wasd.ts
@@ -0,0 +1,82 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class Wasd {
+	private isWPressing = false;
+	private isSPressing = false;
+	private isAPressing = false;
+	private isDPressing = false;
+	private isDashing = false;
+	private setCameraMoveVector: (vec: { x: number; y: number }, dash: boolean) => void;
+
+	constructor(options: {
+		setCameraMoveVector: Wasd['setCameraMoveVector'];
+	}) {
+		this.setCameraMoveVector = options.setCameraMoveVector;
+	}
+
+	private calcWasdVec() {
+		const vec = { x: 0, y: 0 };
+		if (this.isWPressing) vec.y -= 1;
+		if (this.isSPressing) vec.y += 1;
+		if (this.isAPressing) vec.x -= 1;
+		if (this.isDPressing) vec.x += 1;
+		return vec;
+	}
+
+	public keydown(ev: KeyboardEvent) {
+		if (ev.repeat) return;
+
+		switch (ev.code) {
+			case 'KeyW':
+				this.isWPressing = true;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'KeyS':
+				this.isSPressing = true;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'KeyA':
+				this.isAPressing = true;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'KeyD':
+				this.isDPressing = true;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'ShiftLeft':
+			case 'ShiftRight':
+				this.isDashing = true;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+		}
+	}
+
+	public keyup(ev: KeyboardEvent) {
+		switch (ev.code) {
+			case 'KeyW':
+				this.isWPressing = false;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'KeyS':
+				this.isSPressing = false;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'KeyA':
+				this.isAPressing = false;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'KeyD':
+				this.isDPressing = false;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+			case 'ShiftLeft':
+			case 'ShiftRight':
+				this.isDashing = false;
+				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
+				break;
+		}
+	}
+}
diff --git a/packages/frontend/src/world/controller.ts b/packages/frontend/src/world/controller.ts
index f453293d5a..15b0488df4 100644
--- a/packages/frontend/src/world/controller.ts
+++ b/packages/frontend/src/world/controller.ts
@@ -4,7 +4,8 @@
  */
 
 import { shallowRef } from 'vue';
-import { EngineControllerBase, WASD } from './EngineControllerBase.js';
+import { MultiplayerEngineControllerBase } from './MultiplayerEngineControllerBase.js';
+import { Wasd } from './Wasd.js';
 import type { WorldEngine } from 'misskey-world-engine/src/engine.js';
 import type { PlayerProfile, PlayerState } from 'misskey-world-engine/src/PlayerContainer.js';
 
@@ -17,14 +18,9 @@ export type WorldEngineControllerOptions = {
 };
 
 // 抽象化レイヤー
-export class WorldEngineController extends EngineControllerBase<WorldEngine> {
-	public myPlayerState = shallowRef<PlayerState>({
-		position: [0, 0, 0],
-		rotation: [0, 0, 0],
-	});
-
+export class WorldEngineController extends MultiplayerEngineControllerBase<WorldEngine> {
 	constructor(options: WorldEngineControllerOptions) {
-		super(options, new WASD({
+		super(options, new Wasd({
 			setCameraMoveVector: (vec, dash) => {
 				this.call('cameraMove', [vec, dash]);
 			},
diff --git a/packages/frontend/src/world/engineControllerBase.ts b/packages/frontend/src/world/engineControllerBase.ts
index bd3a30d8ad..8f73bc0e31 100644
--- a/packages/frontend/src/world/engineControllerBase.ts
+++ b/packages/frontend/src/world/engineControllerBase.ts
@@ -6,12 +6,10 @@
 import { reactive, ref, shallowRef, triggerRef, watch } from 'vue';
 import { EventEmitter } from 'eventemitter3';
 import type { EngineBase, EngineBaseEvents } from 'frontend-misskey-world-engine/src/EngineBase.js';
-import type { PlayerProfile, PlayerState } from 'misskey-world-engine/src/PlayerContainer.js';
+import type { Wasd } from './Wasd.js';
 import * as os from '@/os.js';
 import { i18n } from '@/i18n.js';
 
-// TODO: multiplayer関連は全ての子クラスで必要とは限らない(preview用など)ため、このクラスを継承する別のabstract classに分離
-
 export type EngineControllerBaseOptions = {
 	workerMode?: boolean;
 	graphicsQuality: number;
@@ -24,84 +22,6 @@ type EngineEventsOf<T> = T extends EngineBase<infer X> ? X : EngineBaseEvents;
 
 type ControllerEvents = EventEmitter.ValidEventTypes;
 
-export class WASD {
-	private isWPressing = false;
-	private isSPressing = false;
-	private isAPressing = false;
-	private isDPressing = false;
-	private isDashing = false;
-	private setCameraMoveVector: (vec: { x: number; y: number }, dash: boolean) => void;
-
-	constructor(options: {
-		setCameraMoveVector: WASD['setCameraMoveVector'];
-	}) {
-		this.setCameraMoveVector = options.setCameraMoveVector;
-	}
-
-	private calcWasdVec() {
-		const vec = { x: 0, y: 0 };
-		if (this.isWPressing) vec.y -= 1;
-		if (this.isSPressing) vec.y += 1;
-		if (this.isAPressing) vec.x -= 1;
-		if (this.isDPressing) vec.x += 1;
-		return vec;
-	}
-
-	public keydown(ev: KeyboardEvent) {
-		if (ev.repeat) return;
-
-		switch (ev.code) {
-			case 'KeyW':
-				this.isWPressing = true;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'KeyS':
-				this.isSPressing = true;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'KeyA':
-				this.isAPressing = true;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'KeyD':
-				this.isDPressing = true;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'ShiftLeft':
-			case 'ShiftRight':
-				this.isDashing = true;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-		}
-	}
-
-	public keyup(ev: KeyboardEvent) {
-		switch (ev.code) {
-			case 'KeyW':
-				this.isWPressing = false;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'KeyS':
-				this.isSPressing = false;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'KeyA':
-				this.isAPressing = false;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'KeyD':
-				this.isDPressing = false;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-			case 'ShiftLeft':
-			case 'ShiftRight':
-				this.isDashing = false;
-				this.setCameraMoveVector(this.calcWasdVec(), this.isDashing);
-				break;
-		}
-	}
-}
-
 // UIとエンジンの間に挟まり抽象化を行うレイヤー。
 // UIからは、エンジンが直で動いててもワーカーで動いてても同じように操作できるように見える
 export abstract class EngineControllerBase<T extends EngineBase<EngineBaseEvents>, E extends EventEmitter.ValidEventTypes = EventEmitter.ValidEventTypes> extends EventEmitter<ControllerEvents & E> {
@@ -113,11 +33,11 @@ export abstract class EngineControllerBase<T extends EngineBase<EngineBaseEvents
 	public isReady = ref(false);
 	public initializeProgress = ref(0);
 	private pointerDownPosition: { x: number; y: number } | null = null;
-	private wasd: WASD | null = null;
+	private wasd: Wasd | null = null;
 	private abortController = new AbortController();
 	private destroyed = false;
 
-	constructor(options: EngineControllerBaseOptions, wasd?: WASD) {
+	constructor(options: EngineControllerBaseOptions, wasd?: Wasd) {
 		super();
 		this.options = options;
 		this.wasd = wasd ?? null;
@@ -417,34 +337,6 @@ export abstract class EngineControllerBase<T extends EngineBase<EngineBaseEvents
 		this.call('resumeRender');
 	}
 
-	public sit() {
-		this.call('sit');
-	}
-
-	public lyingDown() {
-		this.call('lyingDown');
-	}
-
-	public standUp() {
-		this.call('standUp');
-	}
-
-	public updatePlayerProfiles(profiles: Record<string, PlayerProfile>) {
-		this.call('updatePlayerProfiles', [profiles]);
-	}
-
-	public updatePlayerStates(states: Record<string, PlayerState>) {
-		this.call('updatePlayerStates', [states]);
-	}
-
-	public clearPlayers() {
-		this.call('clearPlayers');
-	}
-
-	public updateAvatarDisplayOptions(options: { showUsername: boolean; show2dAvatar: boolean }) {
-		this.call('updateAvatarDisplayOptions', [options]);
-	}
-
 	public takeScreenshot() {
 		return this.callAndWaitReturn('takeScreenshot');
 	}
diff --git a/packages/frontend/src/world/multiplayer.ts b/packages/frontend/src/world/multiplayer.ts
index 8fd49f6c22..dc3764f5a5 100644
--- a/packages/frontend/src/world/multiplayer.ts
+++ b/packages/frontend/src/world/multiplayer.ts
@@ -4,23 +4,21 @@
  */
 
 import { reactive, ref, shallowRef, triggerRef, watch } from 'vue';
-import { EventEmitter } from 'eventemitter3';
 import * as Misskey from 'misskey-js';
 import type { PlayerProfile, PlayerState } from 'misskey-world-engine/src/PlayerContainer.js';
-import type { EngineControllerBase } from './EngineControllerBase.js';
+import type { MultiplayerEngineControllerBase } from './MultiplayerEngineControllerBase.js';
 import { useStream } from '@/stream.js';
-import * as os from '@/os.js';
 import { withTimeout } from '@/utility/promise-timeout.js';
 import { deepEqual } from '@/utility/deep-equal.js';
 
 export class Multiplayer {
 	public isOnline = ref(false);
-	private controller: EngineControllerBase<any>;
+	private controller: MultiplayerEngineControllerBase<any>;
 	private connection: Misskey.IChannelConnection<Misskey.Channels['world']> | null = null;
 	private spaceKey: string;
 	public playerProfiles: Record<string, PlayerProfile> = {};
 
-	constructor(spaceKey: string, controller: EngineControllerBase<any>) {
+	constructor(spaceKey: string, controller: MultiplayerEngineControllerBase<any>) {
 		this.spaceKey = spaceKey;
 		this.controller = controller;
 
diff --git a/packages/frontend/src/world/room/controller.ts b/packages/frontend/src/world/room/controller.ts
index df96d48064..b8ade2a3be 100644
--- a/packages/frontend/src/world/room/controller.ts
+++ b/packages/frontend/src/world/room/controller.ts
@@ -5,7 +5,8 @@
 
 import { ref, shallowRef } from 'vue';
 import { cm } from 'misskey-world/src/utility.js';
-import { EngineControllerBase, WASD } from '../EngineControllerBase.js';
+import { MultiplayerEngineControllerBase } from '../MultiplayerEngineControllerBase.js';
+import { Wasd } from '../Wasd.js';
 import type { ShallowRef } from 'vue';
 import type { RoomState_InstalledFurniture } from 'misskey-world/src/room/furniture.js';
 import type { RoomEngine } from 'misskey-world-engine/src/room/engine.js';
@@ -28,7 +29,7 @@ export type RoomControllerOptions = {
 };
 
 // 抽象化レイヤー
-export class RoomController extends EngineControllerBase<RoomEngine, {
+export class RoomController extends MultiplayerEngineControllerBase<RoomEngine, {
 	'playerPointed': { playerId: string; };
 }> {
 	public isSitting = ref(false);
@@ -46,13 +47,9 @@ export class RoomController extends EngineControllerBase<RoomEngine, {
 		}[];
 	} | null>(null);
 	public roomState: ShallowRef<RoomState>;
-	public myPlayerState = shallowRef<PlayerState>({
-		position: [0, 0, 0],
-		rotation: [0, 0, 0],
-	});
 
 	constructor(roomState: RoomState, options: RoomControllerOptions) {
-		super(options, new WASD({
+		super(options, new Wasd({
 			setCameraMoveVector: (vec, dash) => {
 				this.call('cameraMove', [vec, dash]);
 			},