Portal 1 再次免費下載 - Steam

我也不知道有沒有看錯，總之 steam 新聞頁面說 9/20 之前可以免費下載 Portal 1

只要在時限內成功取得，即可永久免費玩 Portal 1

http://store.steampowered.com/app/400/

推坑的好時機!

附上新聞連結

http://store.steampowered.com/news/externalpost/rps/1145261770012618637

http://store.steampowered.com/news/externalpost/pcgamer/1145261770013018346

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