Dead or Alive 2
This is one sweet game. Great graphics. The characters look more like people than polygons. The women look very fine, with curves all in the right place. The gameplay takes an amount of skill, timing reversals, memorizing moves, stuff like that. Also there are not incredibly cheap chracters, with no possible way to win. Some can be pretty cheap, but those characters have weaknesses too. Jann Lee is an example of a cheap character, try his dragon kick and dragon blow over and over and over... If you can only buy one dreamcast game then this is it.
Cheats
Characters (HOT pics inside)
*COMING SOON* Original Artwork by the Zen Master