This is a list of crossovers in video games. "Crossovers" occur when otherwise usually separated fictional elements - video game characters, settings, and gameplay mechanics - exist and interact in the same video game.
This list includes crossovers and cameos of characters from video games owned by one company and close affiliates.
This list includes video games that have crossovers from two or more separate companies.
Video games that have comic book franchise characters encountering or facing off against other comic book franchise characters or third-party video game characters in a crossover video game or as a guest character in a third-party video game include: