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TeamFortress2

TeamFortress2

STEAM吧导航及吧规帖_steam吧_百度贴吧 ... Portal 2 传送门2 Team Fortress 2 军团要塞2 The Sims 3 模拟人生3 ...

Source引擎 - 维基百科，自由的百科全书 ... 传送门2（ Portal 2） 绝地要塞2（ Team Fortress 2）求生之路（ Left 4 Dead） ...

It utilizes the same payment system that Valve uses to sell you ludicrously overpriced hats in Team Fortress 2 .