You have no idea how many people I've tried to relate this too who've looked at me like I was crazy. Finally someone else who remembers the Halo that never was! I can't even find those old vids anywhere, I wouldn't be entirely suprised if M$ had them "surpressed." What's more, all these XBox fans are wetting themselves over Halo 2, but all of the "exciting new features" they're advertising are shown off in those early, pre-xbox vids. Basically, M$ robbed PC gamers of what was to be an interesting new game and crapped out another mediocre FPS for console fans who weren't used to ignoring them on the shelves. And now for the On-Topic: Bias aside, my vote goes for UT2004. It has basically everything Halo has, but more of it. More weapons, maps, vehicles, etc. They tend to be a little more varied in their execution as well. It also has a lot of potential for variety with Mutators and user made mods (check out "Swarm," for example). Also, if you don't mind a historical setting and you haven't tried them yet, you might check out one of the games in the Battlefield series (1942 or Vietnam). The single player isn't so hot, but the multiplayer is excellent and it's a similar kind of FPS w/vehicles combat. Theres a video floating around called "The Evolution of Halo." Showing off what it looked like from Mac World 99 till E3 2001.