Windom XP sp-2 is a game based on the OS wars. Play as Linux or Windows and duke it out. It's an anime giant robot fighting game. I need say no more. It gets five @'s. It has simple controls, a fair system, good graphics (if simplistic), and just all-around awesome. There are plenty of mechs to choose from, and the music and levels, if repetitive, are good for the most part. It has AI and network play.

    Screenie below (Self-taken, ingame after explosion on min-settings), article link goes to game.