但初代《半条命》凭借其引人入胜的叙事和游戏性（以及催生了《反恐精英》），成为了自《毁灭战士》发布以来 FPS 类型中最具爆炸性的作品。然而，令人意想不到的是，Valve 曾一度考虑用另一款游戏作为其盛大亮相之作。

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