Marvel vs. Capcom is a crossover fighting game series developed and published by Capcom, featuring characters from their own video game franchises and comic book series published by Marvel Comics. The series originated as coin-operated arcade games, though later releases would be specifically developed for home consoles, handhelds, and personal computers. Its gameplay borrows heavily from Capcom's previous Marvel-licensed fighting games X-Men: Children of the Atom and Marvel Super Heroes; however, instead of focusing on single combat, the games incorporated tag team battles. Players form teams of two or three characters and, controlling one fighter at a time, attempt to damage and knock out their opponents. Players can switch out their characters during the match, allowing team members to replenish their health and prolong their ability to fight. The series' gameplay is also distinguished from other fighting game franchises due to its character assist mechanics and emphasis on aerial combat. The Marvel vs. Capcom series has received generally positive reviews from critics, who have praised its fast-paced gameplay, animated visuals, and wealth of playable characters. On the other hand, the games have been criticized for their lack of content, especially more recent installments. The series has enjoyed broad appeal, especially in markets outside of Japan, selling approximately 10 million units as of 2021.