This is a very good Mod for Portal!! I played the Linux Native version and there was a game crashing bug, but I found a way to work around it. The story is kind of predictable, and the ending fell flat, but the puzzles make the game well worth playing! The final battle, though, is not just a rehashed battle, as was done in Portal 2. This one is different and more fun, to me at least. Despite the game crashing bug and the disappointing ending I'm still giving this an 8/10, especially as it was free.

I give it a positive rating just because they give an achievement for saving turrets. ^^

good