diff --git a/packages/engine/paima-rest/src/controllers/AchievementsController.ts b/packages/engine/paima-rest/src/controllers/AchievementsController.ts
index be34f260..9863f88b 100644
--- a/packages/engine/paima-rest/src/controllers/AchievementsController.ts
+++ b/packages/engine/paima-rest/src/controllers/AchievementsController.ts
@@ -1,7 +1,7 @@
 import { Controller, Get, Path, Query, Route } from 'tsoa';
-import { EngineService } from '../EngineService';
+import { EngineService } from '../EngineService.js';
 import { ENV } from '@paima/utils';
-import {
+import type {
   AchievementService,
   AchievementPublicList,
   PlayerAchievements,
@@ -65,6 +65,6 @@ export class AchievementsController extends Controller {
     @Query() name?: string
   ): Promise<PlayerAchievements> {
     const wallet = await service().getNftOwner(nft_address);
-    return this.wallet(wallet, name);
+    return await this.wallet(wallet, name);
   }
 }
diff --git a/packages/engine/paima-standalone/src/utils/import.ts b/packages/engine/paima-standalone/src/utils/import.ts
index d9c2d7e5..234ed2a8 100644
--- a/packages/engine/paima-standalone/src/utils/import.ts
+++ b/packages/engine/paima-standalone/src/utils/import.ts
@@ -7,9 +7,11 @@ interface GameCodeCjs {
   default: GameStateTransitionFunctionRouter;
 }
 /**
- * Reads repackaged user's code placed next to the executable in `gameCode.cjs` file
+ * Reads packaged user's code placed next to the executable in `gameCode.cjs` file.
  */
 export function importGameStateTransitionRouter(): GameStateTransitionFunctionRouter {
+  // dynamic import cannot be used here due to PKG limitations
+  // eslint-disable-next-line @typescript-eslint/no-var-requires
   return (require(`${process.cwd()}/${ROUTER_FILENAME}`) as GameCodeCjs).default;
 }
 
@@ -19,7 +21,7 @@ export interface EndpointsCjs {
   AchievementService?: new () => AchievementService;
 }
 /**
- * Reads repackaged user's code placed next to the executable in `endpoints.cjs` file
+ * Reads packaged user's code placed next to the executable in `endpoints.cjs` file.
  */
 export function importEndpoints(): EndpointsCjs {
   return require(`${process.cwd()}/${API_FILENAME}`);
@@ -28,7 +30,7 @@ export function importEndpoints(): EndpointsCjs {
 export const GAME_OPENAPI_FILENAME = 'packaged/openapi.json';
 export type OpenApiJson = object;
 /**
- * Reads repackaged user's code placed next to the executable in `endpoints.cjs` file
+ * Reads packaged user's OpenAPI definitions placed next to the executable in `openapi.json` file.
  */
 export function importOpenApiJson(): OpenApiJson | undefined {
   try {
diff --git a/packages/engine/paima-standalone/src/utils/input.ts b/packages/engine/paima-standalone/src/utils/input.ts
index ce7234bd..36bc6650 100644
--- a/packages/engine/paima-standalone/src/utils/input.ts
+++ b/packages/engine/paima-standalone/src/utils/input.ts
@@ -108,7 +108,7 @@ export const runPaimaEngine = async (): Promise<void> => {
     process.exit(0);
   }
 
-  const [_, config] = await GlobalConfig.mainEvmConfig();
+  const [, config] = await GlobalConfig.mainEvmConfig();
 
   // Check that packed game code is available
   if (checkForPackedGameCode()) {
diff --git a/packages/node-sdk/paima-utils-backend/src/achievements.ts b/packages/node-sdk/paima-utils-backend/src/achievements.ts
index 8c8cd357..c37a803e 100644
--- a/packages/node-sdk/paima-utils-backend/src/achievements.ts
+++ b/packages/node-sdk/paima-utils-backend/src/achievements.ts
@@ -26,7 +26,7 @@ export interface Player {
   /** e.g. addr1234... or 0x1234... */
   wallet: string;
   /** Optional wallet-type */
-  walletType?: 'cardano' | 'evm' | 'polkadot' | 'algorand' | string;
+  walletType?: string; // ex: 'cardano' | 'evm' | 'polkadot' | 'algorand'
   /** If data for specific user: e.g., "1", "player-1", "unique-name", etc. */
   userId?: string;
   /** Player display name */
diff --git a/packages/node-sdk/paima-utils-backend/src/index.ts b/packages/node-sdk/paima-utils-backend/src/index.ts
index b6659375..bfb40d0d 100644
--- a/packages/node-sdk/paima-utils-backend/src/index.ts
+++ b/packages/node-sdk/paima-utils-backend/src/index.ts
@@ -3,7 +3,7 @@ import Crypto from 'crypto';
 export { parseSecurityYaml } from './security.js';
 export * from './cde-access.js';
 export type * from './types.js';
-export * from './achievements';
+export * from './achievements.js';
 
 export function hashTogether(data: string[]): string {
   return Crypto.createHash('sha256').update(data.join()).digest('base64');