Best 2+ Player Video Games?

[wraggster]

I was wondering what you lot would consider the best 2+ player games of all time. Apart from games for mixed skill players, this has never been asked on here before, so it would be interesting to see. From my own experience and research, it looks as though a top 50 would include games such as Streetfighter 2, World of Warcraft, Speedball 2, Super Mario Kart, SWIV, Ikaruga, Stunt Car Racer, Super Monkey Ball, Puzzle Fighter, and Mario Party. Whether they are competitive or cooperative, Slippery slope or Perpetual comeback, 2-player or multiplayer, retro or cutting edge, I want to hear them! I would prefer MMOG games not to be included, unless there is a good deal of interaction between the people in the 'same house' (e.g. perhaps they can team up and play against the world)

[JKKDARK]

Worms World Party (Dreamcast, PlayStation)
Sonic Shuffle (Dreamcast)
Unreal Tournament (Dreamcast, PlayStation 2)
Phantasy Star Online Episode I & II (GameCube, Xbox)
Mega Bomberman (Mega Drive)
Sonic R (Saturn)
Viruta Striker 2 (Dreamcast)
Tiny Toons Acme All-Stars (Mega Drive)
Puyo Puyo Fever (Dreamcast, PlayStation 2, GameCube, Xbox)
Power Stone (Dreamcast)
Power Stone 2 (Dreamcast)

[mcvader]

Goldeneye 007 (best multiplayer ever!!!)
Mario Kart
C&C (all of em)
Killer Instinct
Action Half-Life (Anybody remember this HL mod, I always prefered it to counterstrike)
Battlefield 1942
X-wing vs Tie Fighter
CivNet