Krystal comes to Left 4 Dead 2 in this mod by Goldmember.
the_randomizer brings us an updated version of his Krystal Brawl Mod.
Star Fox multiplayer mod for Team Fortress 2
the_randomizer created a Krystal in Brawl mod last month and released it.
Shadows of Lylat, the Star Fox fangame based on Freespace 2 is no more. But if you fancy yourself a game developer, you can download the files and try to finish what they started.