Purchase the base set to unlock nine new campaign missions, single-device Pass & Play, and perhaps most excitingly, a robust online multiplayer mode!系统需求最低配置:
操作系统 *: Windows XP SP2+
显卡: DX9 (shader model 2.0) capabilities; generally everything made since 2004 should work.*2024 年 1 月 1 日（PT）起，Steam 客户端将仅支持 Windows 10 及更新版本。
