Throughout its history of publications, Marvel Comics has produced many inter-company crossover stories combining characters from different series. The following is a list of crossover events involving superheroes and characters from other series.
- "Event": (main story starts and ends in core limited series and side stories runs in multiple books)
- "Crossover": (main story starts and ends in a single or multiple ongoing books and side stories run in single or multiple books or main story can start and end with bookends and continue in multiple one-shots or ongoing books)
- "Limited Series": (main story starts and ends in single limited issue book)
- "One-Shot": (main story start and end in a single or multiple book)
Line-wide events
1980s
Secret Wars was the first modern Marvel event where a separate limited series was launched, with other tie-ins following it. After its release, Marvel started having annual crossover events where a miniseries was established for the event, which impacted most Marvel comic books.