Issue 4, titled Colosseum, was a major revision to City of Heroes released on Wednesday, May 4, 2005. Some of the major features released in this issue were: * Player versus player matches in the new Arenas * A significant increase in the costume selections available * The ability to highly customize body appearances using custom scales * The addition of supergroup coalitions and coalition chat. * The awarding of the Celebrant Badge to all heroes who logged in during the month following the release of Issue 4 * Peacebringers and Warshades had special story arcs added just for them. * Added a distance limit for receiving rewards from team-defeated enemies outside of door missions.