Hi there 
For Puzzle/Strategy/Adventure I suggest Nullpomino. It's a free tetris clone that is really good!
Here's the link http://code.google.com/p/nullpomino/
Also, for rhythm how about Stepmania?

For Puzzle/Strategy/Adventure I suggest Nullpomino. It's a free tetris clone that is really good!
Here's the link http://code.google.com/p/nullpomino/
Also, for rhythm how about Stepmania?