Ok, I have installed Ubuntu linux on my machine, not sure about the linux platform gaming. So please suggest some good game? Thanks

Hey, World of Warcraft is good, I also have Ubuntu installed and it runs perfectly. But you need to run it with Wine, look round the net to find out the how to.
Most games will run on linux if you fine a hot too. It realy depends what genre your into, but
MMORPG = WoW
FPS= Counter strike sorce will work but urban terror offes support
Have a look round, google it a bit, also id like to know some more so post if you winde some goodones