And I know you want to be a gamer: WINE supports Steam and Valve games, and such.
As for Windows, if all else fails, TPB. (I didn't say that.)
If you want to game, please don't think that Linux plus WINE is an acceptable option. The Steam program itself runs like shit on WINE, and most games lag or run choppily in WINE. Try using Windows 7, it works on XP machines and is free for now.
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