They call me hadouken 'cause I'm down-right fierce.

C P S 3
Emulator
Roms (Minus Warzard)
Warzard

For those who aren't as into the arcade scene as I am (and I'm not that far in, by the way), the CPS3 was released in 1996 and only ever had six games made for it: Three versions of Street Fighter III, two Jojo's Bizzare Adventure games, and Warzard (also known as Red Earth). All are worth playing. This system was apparently so complicated, fragile, and had such good protection (tampering with the security cartridge included with each game causes it to erase the decryption key needed to run the game) that up until very recently people thought that it might never be emulated. Then Andreas Naive figured it out, and a few days later the emulator rapidshared here was released. Friggin' insanity. NOW LET'S GET CRACKIN' ON NAOMI, BOYS!
Also: Even if you don't like 2D fighters, fire up Street Fighter III (any version) to see some of the best animation ever. Super-nuts.