At the moment, only one of the five games runs on GNU/Linux: Pakkuman's defense, a pacman game where you can also build towers to defend yourself against the ghosts.
Apart from the potential open-sourcing, some of the games also show interesting gameplay ideas.
I like the one from Rose and time for instance: "Time travel stealth game where you are avoiding copies of yourself from the past/future. "
(although from what I've seen it's a bit more like a puzzle game than a splinter-cell/metal gear solid/hitman/etc-like "stealth game". Still looks interesting to play.)
More info here:
http://indiebuskers.net/
http://www.desura.com/groups/linux-game ... se-sources
And a few videos:
https://www.youtube.com/watch?v=KsVDeFILbIw
https://www.youtube.com/watch?v=m0rQ-0dc32c
https://www.youtube.com/watch?v=IMovQOfiDf0
https://www.youtube.com/watch?v=RDsWxI1ARS0
https://www.youtube.com/watch?v=4ioptqwds4g
