diff --git a/src/client/AccountModal.ts b/src/client/AccountModal.ts
index 0536c0a582..e723be4c36 100644
--- a/src/client/AccountModal.ts
+++ b/src/client/AccountModal.ts
@@ -6,7 +6,7 @@ import {
   UserMeResponse,
 } from "../core/ApiSchemas";
 import { assetUrl } from "../core/AssetUrls";
-import { getServerConfigFromClient } from "../core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "../core/configuration/ConfigLoader";
 import { fetchPlayerById, getUserMe } from "./Api";
 import { discordLogin, logOut, sendMagicLink } from "./Auth";
 import "./components/baseComponents/stats/DiscordUserHeader";
@@ -217,7 +217,7 @@ export class AccountModal extends BaseModal {
 
   private async viewGame(gameId: string): Promise<void> {
     this.close();
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     const encodedGameId = encodeURIComponent(gameId);
     const newUrl = `/${config.workerPath(gameId)}/game/${encodedGameId}`;
 
diff --git a/src/client/ClientGameRunner.ts b/src/client/ClientGameRunner.ts
index 7b483373c5..68794eedd6 100644
--- a/src/client/ClientGameRunner.ts
+++ b/src/client/ClientGameRunner.ts
@@ -12,7 +12,7 @@ import {
 } from "../core/Schemas";
 import { createPartialGameRecord, findClosestBy, replacer } from "../core/Util";
 import { ServerConfig } from "../core/configuration/Config";
-import { getConfig } from "../core/configuration/ConfigLoader";
+import { getGameLogicConfig } from "../core/configuration/ConfigLoader";
 import { BuildableUnit, Structures, UnitType } from "../core/game/Game";
 import { TileRef } from "../core/game/GameMap";
 import { GameMapLoader } from "../core/game/GameMapLoader";
@@ -214,7 +214,7 @@ async function createClientGame(
   if (lobbyConfig.gameStartInfo === undefined) {
     throw new Error("missing gameStartInfo");
   }
-  const config = await getConfig(
+  const config = await getGameLogicConfig(
     lobbyConfig.gameStartInfo.config,
     userSettings,
     lobbyConfig.gameRecord !== undefined,
diff --git a/src/client/GameModeSelector.ts b/src/client/GameModeSelector.ts
index e80047a6cc..112578e6c6 100644
--- a/src/client/GameModeSelector.ts
+++ b/src/client/GameModeSelector.ts
@@ -1,6 +1,6 @@
 import { html, LitElement, nothing, type TemplateResult } from "lit";
 import { customElement, state } from "lit/decorators.js";
-import { getServerConfigFromClient } from "src/core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "src/core/configuration/ConfigLoader";
 import {
   Duos,
   GameMapType,
@@ -58,7 +58,7 @@ export class GameModeSelector extends LitElement {
   connectedCallback() {
     super.connectedCallback();
     this.lobbySocket.start();
-    getServerConfigFromClient().then((config) => {
+    getRuntimeClientServerConfig().then((config) => {
       this.defaultLobbyTime = config.gameCreationRate() / 1000;
     });
   }
diff --git a/src/client/HostLobbyModal.ts b/src/client/HostLobbyModal.ts
index 4010973176..6436cc04de 100644
--- a/src/client/HostLobbyModal.ts
+++ b/src/client/HostLobbyModal.ts
@@ -1,7 +1,7 @@
 import { html } from "lit";
 import { customElement, property, state } from "lit/decorators.js";
 import { translateText } from "../client/Utils";
-import { getServerConfigFromClient } from "../core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "../core/configuration/ConfigLoader";
 import { EventBus } from "../core/EventBus";
 import {
   Difficulty,
@@ -113,7 +113,7 @@ export class HostLobbyModal extends BaseModal {
         return link;
       }
     }
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     return `${window.location.origin}/${config.workerPath(this.lobbyId)}/game/${this.lobbyId}?lobby&s=${encodeURIComponent(this.lobbyUrlSuffix)}`;
   }
 
@@ -823,7 +823,7 @@ export class HostLobbyModal extends BaseModal {
     // If the modal closes as part of starting the game, do not leave the lobby
     this.leaveLobbyOnClose = false;
 
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     const response = await fetch(
       `${window.location.origin}/${config.workerPath(this.lobbyId)}/api/start_game/${this.lobbyId}`,
       {
@@ -871,7 +871,7 @@ export class HostLobbyModal extends BaseModal {
 }
 
 async function createLobby(gameID: string): Promise<GameInfo> {
-  const config = await getServerConfigFromClient();
+  const config = await getRuntimeClientServerConfig();
   // Send JWT token for creator identification - server extracts persistentID from it
   // persistentID should never be exposed to other clients
   const token = await getPlayToken();
diff --git a/src/client/JoinLobbyModal.ts b/src/client/JoinLobbyModal.ts
index 38b41ec694..c389ceb06b 100644
--- a/src/client/JoinLobbyModal.ts
+++ b/src/client/JoinLobbyModal.ts
@@ -19,7 +19,7 @@ import {
   LobbyInfoEvent,
   PublicGameInfo,
 } from "../core/Schemas";
-import { getServerConfigFromClient } from "../core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "../core/configuration/ConfigLoader";
 import {
   Difficulty,
   GameMapSize,
@@ -897,7 +897,7 @@ export class JoinLobbyModal extends BaseModal {
   }
 
   private async checkActiveLobby(lobbyId: string): Promise<boolean> {
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     const url = `/${config.workerPath(lobbyId)}/api/game/${lobbyId}/exists`;
 
     const response = await fetch(url, {
diff --git a/src/client/LobbySocket.ts b/src/client/LobbySocket.ts
index 4e4922508a..e664329b7d 100644
--- a/src/client/LobbySocket.ts
+++ b/src/client/LobbySocket.ts
@@ -1,4 +1,4 @@
-import { getServerConfigFromClient } from "../core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "../core/configuration/ConfigLoader";
 import { PublicGames, PublicGamesSchema } from "../core/Schemas";
 
 interface LobbySocketOptions {
@@ -35,7 +35,7 @@ export class PublicLobbySocket {
     this.stopped = false;
     this.wsConnectionAttempts = 0;
     // Get config to determine number of workers, then pick a random one
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     this.workerPath = getRandomWorkerPath(config.numWorkers());
     this.connectWebSocket();
   }
diff --git a/src/client/Main.ts b/src/client/Main.ts
index b4ed449af7..d6759412ac 100644
--- a/src/client/Main.ts
+++ b/src/client/Main.ts
@@ -9,7 +9,7 @@ import {
   PublicGameInfo,
 } from "../core/Schemas";
 import { GameEnv } from "../core/configuration/Config";
-import { getServerConfigFromClient } from "../core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "../core/configuration/ConfigLoader";
 import { GameType } from "../core/game/Game";
 import { UserSettings } from "../core/game/UserSettings";
 import "./AccountModal";
@@ -749,7 +749,7 @@ class Client {
     if (lobby.source === "public") {
       this.joinModal?.open(lobby.gameID, lobby.publicLobbyInfo);
     }
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     // Only update URL immediately for private lobbies, not public ones
     if (lobby.source !== "public") {
       this.updateJoinUrlForShare(lobby.gameID, config);
@@ -857,7 +857,7 @@ class Client {
 
   private updateJoinUrlForShare(
     lobbyId: string,
-    config: Awaited<ReturnType<typeof getServerConfigFromClient>>,
+    config: Awaited<ReturnType<typeof getRuntimeClientServerConfig>>,
   ) {
     const lobbyIdHidden = !this.userSettings.lobbyIdVisibility();
     const targetUrl = lobbyIdHidden
@@ -930,7 +930,7 @@ class Client {
   private async getTurnstileToken(
     lobby: JoinLobbyEvent,
   ): Promise<string | null> {
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     if (
       config.env() === GameEnv.Dev ||
       lobby.gameStartInfo?.config.gameType === GameType.Singleplayer
@@ -1008,7 +1008,7 @@ async function getTurnstileToken(): Promise<{
     throw new Error("Failed to load Turnstile script");
   }
 
-  const config = await getServerConfigFromClient();
+  const config = await getRuntimeClientServerConfig();
   const widgetId = window.turnstile.render("#turnstile-container", {
     sitekey: config.turnstileSiteKey(),
     size: "normal",
diff --git a/src/client/Matchmaking.ts b/src/client/Matchmaking.ts
index 79ddc3da95..904ee266b5 100644
--- a/src/client/Matchmaking.ts
+++ b/src/client/Matchmaking.ts
@@ -1,7 +1,7 @@
 import { html, LitElement } from "lit";
 import { customElement, state } from "lit/decorators.js";
 import { UserMeResponse } from "../core/ApiSchemas";
-import { getServerConfigFromClient } from "../core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "../core/configuration/ConfigLoader";
 import { getUserMe, hasLinkedAccount } from "./Api";
 import { getPlayToken } from "./Auth";
 import { BaseModal } from "./components/BaseModal";
@@ -87,7 +87,7 @@ export class MatchmakingModal extends BaseModal {
   }
 
   private async connect() {
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     const instanceId = await MatchmakingModal.getInstanceId();
 
     this.socket = new WebSocket(
@@ -210,7 +210,7 @@ export class MatchmakingModal extends BaseModal {
     if (this.gameID === null) {
       return;
     }
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     const url = `/${config.workerPath(this.gameID)}/api/game/${this.gameID}/exists`;
 
     const response = await fetch(url, {
diff --git a/src/client/components/CopyButton.ts b/src/client/components/CopyButton.ts
index 5a7b7fbeca..dea21f618d 100644
--- a/src/client/components/CopyButton.ts
+++ b/src/client/components/CopyButton.ts
@@ -1,6 +1,6 @@
 import { LitElement, html } from "lit";
 import { customElement, property, state } from "lit/decorators.js";
-import { getServerConfigFromClient } from "../../core/configuration/ConfigLoader";
+import { getRuntimeClientServerConfig } from "../../core/configuration/ConfigLoader";
 import { UserSettings } from "../../core/game/UserSettings";
 import { crazyGamesSDK } from "../CrazyGamesSDK";
 import { copyToClipboard, translateText } from "../Utils";
@@ -66,7 +66,7 @@ export class CopyButton extends LitElement {
   }
 
   private async buildCopyUrl(): Promise<string> {
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
     let url = `${window.location.origin}/${config.workerPath(this.lobbyId)}/game/${this.lobbyId}`;
     if (this.includeLobbyQuery) {
       url += `?lobby&s=${encodeURIComponent(this.lobbySuffix)}`;
diff --git a/src/core/GameRunner.ts b/src/core/GameRunner.ts
index ecc311112f..7732a6eb3f 100644
--- a/src/core/GameRunner.ts
+++ b/src/core/GameRunner.ts
@@ -1,5 +1,5 @@
 import { placeName } from "../client/graphics/NameBoxCalculator";
-import { getConfig } from "./configuration/ConfigLoader";
+import { getGameLogicConfig } from "./configuration/ConfigLoader";
 import { Executor } from "./execution/ExecutionManager";
 import { RecomputeRailClusterExecution } from "./execution/RecomputeRailClusterExecution";
 import { WinCheckExecution } from "./execution/WinCheckExecution";
@@ -35,7 +35,7 @@ export async function createGameRunner(
   mapLoader: GameMapLoader,
   callBack: (gu: GameUpdateViewData | ErrorUpdate) => void,
 ): Promise<GameRunner> {
-  const config = await getConfig(gameStart.config, null);
+  const config = await getGameLogicConfig(gameStart.config, null);
   const gameMap = await loadGameMap(
     gameStart.config.gameMap,
     gameStart.config.gameMapSize,
diff --git a/src/core/configuration/ConfigLoader.ts b/src/core/configuration/ConfigLoader.ts
index 4987da1c30..abb8d3fbcf 100644
--- a/src/core/configuration/ConfigLoader.ts
+++ b/src/core/configuration/ConfigLoader.ts
@@ -1,13 +1,18 @@
 import { UserSettings } from "../game/UserSettings";
 import { GameConfig } from "../Schemas";
-import { Config, GameEnv, ServerConfig } from "./Config";
+import { Config, ServerConfig } from "./Config";
 import { DefaultConfig } from "./DefaultConfig";
 import { DevConfig, DevServerConfig } from "./DevConfig";
 import { Env } from "./Env";
 import { preprodConfig } from "./PreprodConfig";
 import { prodConfig } from "./ProdConfig";
 
-export let cachedSC: ServerConfig | null = null;
+export enum GameLogicEnv {
+  Dev = "dev",
+  Default = "default",
+}
+
+export let cachedRuntimeClientServerConfig: ServerConfig | null = null;
 
 declare global {
   interface Window {
@@ -17,35 +22,77 @@ declare global {
   }
 }
 
-export async function getConfig(
+export async function getGameLogicConfig(
   gameConfig: GameConfig,
   userSettings: UserSettings | null,
   isReplay: boolean = false,
 ): Promise<Config> {
-  const sc = await getServerConfigFromClient();
-  switch (sc.env()) {
-    case GameEnv.Dev:
-      return new DevConfig(sc, gameConfig, userSettings, isReplay);
-    case GameEnv.Preprod:
-    case GameEnv.Prod:
-      console.log("using prod config");
-      return new DefaultConfig(sc, gameConfig, userSettings, isReplay);
+  const gameLogicEnv = getBuildTimeGameLogicEnv();
+  const serverConfig = getServerConfigForGameLogicEnv(gameLogicEnv);
+
+  switch (gameLogicEnv) {
+    case GameLogicEnv.Dev:
+      return new DevConfig(serverConfig, gameConfig, userSettings, isReplay);
+    case GameLogicEnv.Default:
+      return new DefaultConfig(
+        serverConfig,
+        gameConfig,
+        userSettings,
+        isReplay,
+      );
+    default:
+      throw Error(`unsupported game logic environment: ${gameLogicEnv}`);
+  }
+}
+
+export function getBuildTimeGameLogicEnv(): GameLogicEnv {
+  const bundledGameEnv = process.env.GAME_ENV;
+
+  switch (bundledGameEnv) {
+    case "dev":
+      return GameLogicEnv.Dev;
+    case "staging":
+    case "prod":
+      return GameLogicEnv.Default;
+    case undefined:
+      throw new Error("Missing bundled game logic env");
+    default:
+      throw Error(`unsupported bundled game logic env: ${bundledGameEnv}`);
+  }
+}
+
+export function getServerConfigForGameLogicEnv(
+  gameLogicEnv: GameLogicEnv,
+): ServerConfig {
+  switch (gameLogicEnv) {
+    case GameLogicEnv.Dev:
+      return new DevServerConfig();
+    case GameLogicEnv.Default:
+      console.log("using default game logic config");
+      return prodConfig;
     default:
-      throw Error(`unsupported server configuration: ${Env.GAME_ENV}`);
+      throw Error(`unsupported game logic environment: ${gameLogicEnv}`);
   }
 }
-export async function getServerConfigFromClient(): Promise<ServerConfig> {
-  if (cachedSC) {
-    return cachedSC;
+
+export async function getRuntimeClientServerConfig(): Promise<ServerConfig> {
+  if (cachedRuntimeClientServerConfig) {
+    return cachedRuntimeClientServerConfig;
+  }
+
+  if (typeof window === "undefined") {
+    throw new Error(
+      "Runtime client server config is only available on the browser main thread",
+    );
   }
 
-  const bootstrapGameEnv = window.BOOTSTRAP_CONFIG?.gameEnv;
-  if (!bootstrapGameEnv) {
-    throw new Error("Missing bootstrap server config");
+  const runtimeClientEnv = window.BOOTSTRAP_CONFIG?.gameEnv;
+  if (!runtimeClientEnv) {
+    throw new Error("Missing runtime client server config");
   }
 
-  cachedSC = getServerConfig(bootstrapGameEnv);
-  return cachedSC;
+  cachedRuntimeClientServerConfig = getServerConfig(runtimeClientEnv);
+  return cachedRuntimeClientServerConfig;
 }
 export function getServerConfigFromServer(): ServerConfig {
   const gameEnv = Env.GAME_ENV;
@@ -67,6 +114,6 @@ export function getServerConfig(gameEnv: string) {
   }
 }
 
-export function clearCachedServerConfig(): void {
-  cachedSC = null;
+export function clearCachedRuntimeClientServerConfig(): void {
+  cachedRuntimeClientServerConfig = null;
 }
diff --git a/tests/core/configuration/ConfigLoader.test.ts b/tests/core/configuration/ConfigLoader.test.ts
index 65fd817577..e0e1a06297 100644
--- a/tests/core/configuration/ConfigLoader.test.ts
+++ b/tests/core/configuration/ConfigLoader.test.ts
@@ -1,24 +1,44 @@
 import { beforeEach, describe, expect, test, vi } from "vitest";
 import { GameEnv } from "../../../src/core/configuration/Config";
 import {
-  clearCachedServerConfig,
-  getServerConfigFromClient,
+  clearCachedRuntimeClientServerConfig,
+  GameLogicEnv,
+  getBuildTimeGameLogicEnv,
+  getGameLogicConfig,
+  getRuntimeClientServerConfig,
+  getServerConfigForGameLogicEnv,
 } from "../../../src/core/configuration/ConfigLoader";
 
 describe("ConfigLoader", () => {
+  const originalGameEnv = process.env.GAME_ENV;
+
   beforeEach(() => {
     vi.restoreAllMocks();
     window.BOOTSTRAP_CONFIG = undefined;
-    clearCachedServerConfig();
+    process.env.GAME_ENV = originalGameEnv;
+    clearCachedRuntimeClientServerConfig();
   });
 
-  test("uses bootstrap config without fetching /api/env", async () => {
-    window.BOOTSTRAP_CONFIG = { gameEnv: "prod" };
+  test("uses runtime bootstrap config without fetching /api/env", async () => {
+    window.BOOTSTRAP_CONFIG = { gameEnv: "staging" };
     const fetchSpy = vi.spyOn(globalThis, "fetch");
 
-    const config = await getServerConfigFromClient();
+    const config = await getRuntimeClientServerConfig();
 
-    expect(config.env()).toBe(GameEnv.Prod);
+    expect(config.env()).toBe(GameEnv.Preprod);
     expect(fetchSpy).not.toHaveBeenCalled();
   });
+
+  test("maps staging builds to the default game logic config", async () => {
+    process.env.GAME_ENV = "staging";
+
+    expect(getBuildTimeGameLogicEnv()).toBe(GameLogicEnv.Default);
+    expect(getServerConfigForGameLogicEnv(GameLogicEnv.Default).env()).toBe(
+      GameEnv.Prod,
+    );
+
+    const config = await getGameLogicConfig({} as any, null);
+
+    expect(config.serverConfig().env()).toBe(GameEnv.Prod);
+  });
 });