diff --git a/src/engine/action/action-pipeline.ts b/src/engine/action/action-pipeline.ts
index 3cfe638e..3b319928 100644
--- a/src/engine/action/action-pipeline.ts
+++ b/src/engine/action/action-pipeline.ts
@@ -6,6 +6,7 @@ import { LandscapeObject } from '@runejs/filestore';
 import { Actor, Player } from '@engine/world/actor';
 import { ActionHook, TaskExecutor } from '@engine/action';
 import { Position } from '@engine/world';
+import { isPlayer } from '@engine/world/actor/util';
 
 
 /**
@@ -200,7 +201,7 @@ export class ActionPipeline {
     }
 
     public get paused(): boolean {
-        if(this.actor instanceof Player) {
+        if(isPlayer(this.actor)) {
             if(this.actor.interfaceState.widgetOpen()) {
                 return true;
             }
diff --git a/src/engine/action/hook/task.ts b/src/engine/action/hook/task.ts
index 3677c966..0738a485 100644
--- a/src/engine/action/hook/task.ts
+++ b/src/engine/action/hook/task.ts
@@ -6,6 +6,7 @@ import { logger } from '@runejs/common';
 import { ActionHook, ActionStrength } from '@engine/action';
 import { World } from '@engine/world';
 import { Actor, Player, Npc } from '@engine/world/actor';
+import { isNpc, isPlayer } from '@engine/world/actor/util';
 
 
 export type TaskSessionData = { [key: string]: any };
@@ -149,8 +150,8 @@ export class TaskExecutor<T> {
     public getDetails(): TaskDetails<T> {
         return {
             actor: this.actor,
-            player: this.actor.isPlayer() ? this.actor : undefined,
-            npc: this.actor.isNpc() ? this.actor : undefined,
+            player: isPlayer(this.actor) ? this.actor : undefined,
+            npc: isNpc(this.actor) ? this.actor : undefined,
             actionData: this.actionData,
             session: this.session
         };
diff --git a/src/engine/world/actor/actor.ts b/src/engine/world/actor/actor.ts
index 7d48c853..621d7159 100644
--- a/src/engine/world/actor/actor.ts
+++ b/src/engine/world/actor/actor.ts
@@ -17,6 +17,7 @@ import { ObjectConfig } from '@runejs/filestore';
 import { QueueableTask } from '@engine/action/pipe/task/queueable-task';
 import { Npc } from '@engine/world/actor/npc';
 import { Player } from '@engine/world/actor/player';
+import { isNpc } from '@engine/world/actor/util';
 
 
 export type ActorType = 'player' | 'npc';
@@ -357,7 +358,7 @@ export abstract class Actor {
             return;
         }
 
-        if(this.isNpc()) {
+        if(isNpc(this)) {
             const nearbyPlayers = activeWorld.findNearbyPlayers(this.position, 24, this.instance.instanceId);
             if(nearbyPlayers.length === 0) {
                 // No need for this actor to move if there are no players nearby to witness it, save some memory. :)
@@ -485,14 +486,6 @@ export abstract class Actor {
         this.scheduler.tick();
     }
 
-    public isPlayer(): this is Player {
-        return this.type === 'player';
-    }
-
-    public isNpc(): this is Npc {
-        return this.type === 'npc';
-    }
-
     public get position(): Position {
         return this._position;
     }
diff --git a/src/engine/world/actor/npc.ts b/src/engine/world/actor/npc.ts
index b86dc41e..7cdea91f 100644
--- a/src/engine/world/actor/npc.ts
+++ b/src/engine/world/actor/npc.ts
@@ -10,6 +10,7 @@ import { Actor } from './actor';
 import { Player } from './player';
 import { SkillName } from './skills';
 import { logger } from '@runejs/common';
+import { isPlayer } from '@engine/world/actor/util';
 
 /**
  * Represents a non-player character within the game world.
@@ -135,7 +136,7 @@ export class Npc extends Actor {
                 return;
             }
 
-            if(assailant instanceof Player) {
+            if(isPlayer(assailant)) {
                 const itemDrops = calculateNpcDrops(assailant, npcDetails);
                 itemDrops.forEach(drop => {
                     const droppedItem = findItem(drop.itemKey);
@@ -151,7 +152,7 @@ export class Npc extends Actor {
                     }
 
                     activeWorld.globalInstance.spawnWorldItem({ itemId: droppedItem.gameId, amount: drop.amount },
-                        deathPosition, { owner: assailant instanceof Player ? assailant : undefined, expires: 300 });
+                        deathPosition, { owner: assailant, expires: 300 });
                 })
             }
         });
diff --git a/src/engine/world/actor/pathfinding.ts b/src/engine/world/actor/pathfinding.ts
index c02eb914..634dd257 100644
--- a/src/engine/world/actor/pathfinding.ts
+++ b/src/engine/world/actor/pathfinding.ts
@@ -6,6 +6,7 @@ import { logger } from '@runejs/common';
 import { WorldInstance } from '@engine/world/instances';
 import { Tile } from '@engine/world/map/chunk-manager';
 import { activeWorld } from '@engine/world';
+import { isPlayer } from '@engine/world/actor/util';
 
 
 class Point {
@@ -447,7 +448,7 @@ export class Pathfinding {
     }
 
     private get instance(): WorldInstance {
-        return this.actor instanceof Player ? this.actor.instance : activeWorld.globalInstance;
+        return isPlayer(this.actor) ? this.actor.instance : activeWorld.globalInstance;
     }
 
 }
diff --git a/src/engine/world/actor/player/player.ts b/src/engine/world/actor/player/player.ts
index 634c900b..15097d5f 100644
--- a/src/engine/world/actor/player/player.ts
+++ b/src/engine/world/actor/player/player.ts
@@ -1048,7 +1048,7 @@ export class Player extends Actor {
      * Transform's the player's appearance into the specified NPC.
      * @param npc The NPC to copy the appearance of, or null to reset.
      */
-    public transformInto(npc: Npc | NpcDetails | string | number | null): void {
+    public transformInto(npc: NpcDetails | string | number | null): void {
         if(!npc) {
             delete this.savedMetadata.npcTransformation;
             this.updateFlags.appearanceUpdateRequired = true;
@@ -1062,8 +1062,6 @@ export class Player extends Actor {
                 } else {
                     npc = parseInt(npc, 10);
                 }
-            } else if(npc instanceof Npc) {
-                npc = npc.id;
             } else {
                 npc = npc.gameId;
             }
diff --git a/src/engine/world/actor/player/sync/actor-sync.ts b/src/engine/world/actor/player/sync/actor-sync.ts
index bbacf0c0..83da3b39 100644
--- a/src/engine/world/actor/player/sync/actor-sync.ts
+++ b/src/engine/world/actor/player/sync/actor-sync.ts
@@ -7,6 +7,7 @@ import { QuadtreeKey } from '@engine/world';
 import { Actor } from '@engine/world/actor/actor';
 import { Player } from '../player';
 import { activeWorld } from '@engine/world';
+import { isNpc, isPlayer } from '@engine/world/actor/util';
 
 
 /**
@@ -31,7 +32,7 @@ export function registerNewActors(packet: Packet, player: Player, trackedActors:
     for(const newActor of newActors) {
         const nearbyActor = newActor.actor;
 
-        if(nearbyActor instanceof Player) {
+        if(isPlayer(nearbyActor)) {
             if(player.equals(nearbyActor)) {
                 // Other player is actually this player!
                 continue;
@@ -41,7 +42,7 @@ export function registerNewActors(packet: Packet, player: Player, trackedActors:
                 // Other player is no longer in the game world
                 continue;
             }
-        } else if(nearbyActor instanceof Npc) {
+        } else if(isNpc(nearbyActor)) {
             if(!activeWorld.npcExists(nearbyActor)) {
                 // Npc is no longer in the game world
                 continue;
@@ -86,7 +87,7 @@ export function syncTrackedActors(packet: Packet, playerPosition: Position, appe
         const trackedActor: Actor = trackedActors[i];
         let exists = true;
 
-        if(trackedActor.isPlayer()) {
+        if(isPlayer(trackedActor)) {
             if(!activeWorld.playerOnline(trackedActor)) {
                 exists = false;
             }
diff --git a/src/engine/world/actor/player/sync/npc-sync-task.ts b/src/engine/world/actor/player/sync/npc-sync-task.ts
index db8a8c54..12a79268 100644
--- a/src/engine/world/actor/player/sync/npc-sync-task.ts
+++ b/src/engine/world/actor/player/sync/npc-sync-task.ts
@@ -5,6 +5,7 @@ import { Npc } from '@engine/world/actor/npc';
 import { registerNewActors, SyncTask, syncTrackedActors } from './actor-sync';
 import { Player } from '../player';
 import { activeWorld } from '@engine/world';
+import { isPlayer } from '@engine/world/actor/util';
 
 
 /**
@@ -146,7 +147,7 @@ export class NpcSyncTask extends SyncTask<void> {
             } else {
                 let worldIndex = actor.worldIndex;
 
-                if(actor instanceof Player) {
+                if(isPlayer(actor)) {
                     // Client checks if index is less than 32768.
                     // If it is, it looks for an NPC.
                     // If it isn't, it looks for a player (subtracting 32768 to find the index).
diff --git a/src/engine/world/actor/player/sync/player-sync-task.ts b/src/engine/world/actor/player/sync/player-sync-task.ts
index 11333c87..8e0fa881 100644
--- a/src/engine/world/actor/player/sync/player-sync-task.ts
+++ b/src/engine/world/actor/player/sync/player-sync-task.ts
@@ -8,6 +8,7 @@ import { EquipmentSlot, EquipmentType, ItemDetails } from '@engine/config/item-c
 import { appendMovement, registerNewActors, SyncTask, syncTrackedActors } from './actor-sync';
 import { Player } from '../player';
 import { activeWorld } from '@engine/world';
+import { isPlayer } from '@engine/world/actor/util';
 
 
 /**
@@ -173,7 +174,7 @@ export class PlayerSyncTask extends SyncTask<void> {
                 const actor = updateFlags.faceActor;
                 let worldIndex = actor.worldIndex;
 
-                if(actor instanceof Player) {
+                if(isPlayer(actor)) {
                     // Client checks if index is less than 32768.
                     // If it is, it looks for an NPC.
                     // If it isn't, it looks for a player (subtracting 32768 to find the index).
diff --git a/src/engine/world/actor/skills.ts b/src/engine/world/actor/skills.ts
index 724515da..e74aaa82 100644
--- a/src/engine/world/actor/skills.ts
+++ b/src/engine/world/actor/skills.ts
@@ -4,6 +4,7 @@ import { gfxIds } from '@engine/world/config';
 import { Actor } from './actor';
 import { Player } from './player';
 import { QueueableTask } from '@engine/action/pipe/task/queueable-task';
+import { isPlayer } from '@engine/world/actor/util';
 
 export enum Skill {
     ATTACK,
@@ -226,14 +227,14 @@ export class Skills extends SkillShortcuts {
 
         this.setExp(skill, finalExp);
 
-        if(this.actor.isPlayer()) {
+        if(isPlayer(this.actor)) {
             this.actor.outgoingPackets.updateSkill(this.getSkillId(skill), finalLevel, finalExp);
         }
 
         if(currentLevel !== finalLevel) {
             this.setLevel(skill, finalLevel);
 
-            if(this.actor.isPlayer()) {
+            if(isPlayer(this.actor)) {
                 const achievementDetails = skillDetails[this.getSkillId(skill)];
                 if(!achievementDetails) {
                     return;
@@ -262,7 +263,7 @@ export class Skills extends SkillShortcuts {
     }
 
     public showLevelUpDialogue(skill: number | SkillName, level: number): void {
-        if(!(this.actor.isPlayer())) {
+        if(!(isPlayer(this.actor))) {
             return;
         }
 
diff --git a/src/engine/world/actor/util.ts b/src/engine/world/actor/util.ts
new file mode 100644
index 00000000..2a64fa53
--- /dev/null
+++ b/src/engine/world/actor/util.ts
@@ -0,0 +1,6 @@
+import type { Npc } from './npc';
+import type { Actor } from './actor';
+import type { Player } from './player/player';
+
+export const isPlayer = (actor: Actor): actor is Player => actor.type === 'player';
+export const isNpc = (actor: Actor): actor is Npc => actor.type === 'npc';
diff --git a/src/engine/world/actor/walking-queue.ts b/src/engine/world/actor/walking-queue.ts
index 0e9902a3..b6f41c35 100644
--- a/src/engine/world/actor/walking-queue.ts
+++ b/src/engine/world/actor/walking-queue.ts
@@ -6,6 +6,7 @@ import { regionChangeActionFactory } from '@engine/action';
 import { Subject } from 'rxjs';
 import { activeWorld } from '@engine/world';
 import { logger } from '@runejs/common';
+import { isNpc, isPlayer } from '@engine/world/actor/util';
 
 
 /**
@@ -180,7 +181,7 @@ export class WalkingQueue {
             let runDir = -1;
 
             // @TODO npc running
-            if(this.actor instanceof Player) {
+            if(isPlayer(this.actor)) {
                 if(this.actor.settings.runEnabled && this.queue.length !== 0) {
                     const runPosition = this.queue.shift();
 
@@ -217,7 +218,7 @@ export class WalkingQueue {
 
             this.movementEvent.next(this.actor.position);
 
-            if(this.actor instanceof Player) {
+            if(isPlayer(this.actor)) {
                 const mapDiffX = this.actor.position.x - (lastMapRegionUpdatePosition.chunkX * 8);
                 const mapDiffY = this.actor.position.y - (lastMapRegionUpdatePosition.chunkY * 8);
                 if(mapDiffX < 16 || mapDiffX > 87 || mapDiffY < 16 || mapDiffY > 87) {
@@ -227,12 +228,12 @@ export class WalkingQueue {
             }
 
             if(!oldChunk.equals(newChunk)) {
-                if(this.actor instanceof Player) {
+                if(isPlayer(this.actor)) {
                     this.actor.metadata.updateChunk = { newChunk, oldChunk };
 
                     this.actor.actionPipeline.call('region_change', regionChangeActionFactory(
                         this.actor, originalPosition, this.actor.position));
-                } else if(this.actor instanceof Npc) {
+                } else if(isNpc(this.actor)) {
                     oldChunk.removeNpc(this.actor);
                     newChunk.addNpc(this.actor);
                 }
diff --git a/src/engine/world/world.ts b/src/engine/world/world.ts
index 99955739..21a43ce0 100644
--- a/src/engine/world/world.ts
+++ b/src/engine/world/world.ts
@@ -15,6 +15,7 @@ import { TravelLocations, ExamineCache, parseScenerySpawns } from '@engine/world
 import { loadPlugins } from '@engine/plugins';
 import { TaskScheduler, Task } from '@engine/task';
 import { Isaac } from '@engine/net';
+import { isPlayer } from '@engine/world/actor/util';
 
 
 export interface QuadtreeKey {
@@ -100,7 +101,7 @@ export class World {
         const objectChunk = this.chunkManager.getChunkForWorldPosition(objectPosition);
 
         let customMap = false;
-        if(actor instanceof Player && actor.metadata.customMap) {
+        if(isPlayer(actor) && actor.metadata.customMap) {
             customMap = true;
             const templateMapObject = this.findCustomMapObject(actor, objectId, objectPosition);
             if(templateMapObject) {
@@ -113,7 +114,7 @@ export class World {
         let tileModifications;
         let personalTileModifications;
 
-        if(actor.isPlayer()) {
+        if(isPlayer(actor)) {
             const instance = actor.instance;
 
             if (!instance) {
@@ -130,7 +131,7 @@ export class World {
         if(!landscapeObject) {
             const tileObjects = [ ...tileModifications.mods.spawnedObjects ];
 
-            if(actor.isPlayer()) {
+            if(isPlayer(actor)) {
                 tileObjects.push(...personalTileModifications.mods.spawnedObjects);
             }
 
@@ -146,7 +147,7 @@ export class World {
 
         const hiddenTileObjects = [ ...tileModifications.mods.hiddenObjects ];
 
-        if(actor.isPlayer()) {
+        if(isPlayer(actor)) {
             hiddenTileObjects.push(...personalTileModifications.mods.hiddenObjects);
         }