For an unofficial list, visit http://steamdb.info/linux/.
To install Steam, visit http://store.steampowered.com/about/. The page will offer you to download a
Check out Fabien Sanglard’s non-blog. He has code reviews about Quake and Doom. If you are interested in C/C++ programming and game development, it can be interesting.
“PlayWebGL.com is dedicated to WebGL technology. You’ll find on this website many games, demos and everything else related to WebGL.“
Check out their FAQ to learn more about WebGL, what browser you need, and what games/demos are available.
Extra for me: they have Quake 2, which was one of my favorites “some” years ago.