Capcom's Versus Series consists of a series of fighting games that include characters from various other companies mingled with Capcom's own cast of game characters. The versus series unofficially began with the Capcom fighting game X-Men: Children of the Atom, and continued as Capcom eventually combined the mutants of the X-Men universe with the roster of Street Fighter Alpha.

Over time Capcom entered into contracts with SNK, Tatsunoko and Namco to develop additional Versus series games.

Games in the Versus Series

Marvel Versus

SNK Versus

Tatsunoko Versus

Namco Versus

Namco X Capcom - This is a RPG, not a fighting game.
Street Fighter X Tekken