If you want to find an easy or known to work game check out these sites that SHOULD work Cider or Crossover (Cedega for Cider, Wine for Crossover but Cider also uses wine)

http://appdb.winehq.org/

or

http://www.cedega.com/gamesdb/

Some game engines work better than others here are some

The known game engines that work are:

UnReal Engine II
Unreal Engine I
Jade Engine
Glacier Engine
Half-Life Engine
Source Engine
Infinity Engine

Note that some games still wont work even if they use these engines they could be heavily modified

then look at the various tutorials around here and get started