Give any game that can be tweaked by users enough time and you'll probably see a Lego mod or two show up. We're not sure how amenable Lego Group has to those mods, especially since they have a software game division of their own, but with only slight amounts of obfuscation the mods do appear to find a way to survive.

Lega Warz swaps a vowel and keeps the Lego look (right down to the space logo), but it appears that the mod for the game 'Operation: Flashpoint' is no longer being actively developed. A pity, since the screen shots look amusing. Who hasn't wanted to snipe the little yellow head off a minifig?