X-Men vs. Street Fighter

X-Men vs. Street Fighter is a 1996 crossover fighting game developed and published by Capcom. It is Capcom's third fighting game to feature Marvel Comics characters, following X-Men: Children of the Atom (1994) and Marvel Super Heroes (1995), and the first installment in the Marvel vs. Capcom series. As the title suggests, the game includes characters from Marvel's X-Men franchise and the cast from Capcom's Street Fighter series. Originally released for arcades in 1996, it was ported to the Sega Saturn in 1997 and the PlayStation in 1998. The original arcade version is included in the compilation Marvel vs. Capcom Fighting Collection: Arcade Classics, released for the Nintendo Switch, PlayStation 4 and Windows in 2024.

X-Men vs. Street Fighter features gameplay similar to Street Fighter, but incorporates dual-character selection and tag team-based combat. Each player selects two characters to compete in a one-on-one battle, attempting to defeat the opposing team. The players are given the ability to switch between their characters at any point during the match. The game also incorporates numerous elements from X-Men: Children of the Atom and Marvel Super Heroes.

The game was released to generally positive reviews, with critics praising its gameplay and sprite animation quality. While the Sega Saturn port received praise for maintaining the experience of the original arcade version, the PlayStation port was met with mixed to negative critical reception for removing several features, such as tag team battles. The changes were done in response to the technical limitations of the PlayStation. The game was followed by Marvel Super Heroes vs. Street Fighter in 1997.