Gun Mayhem is a beloved flash-era multiplayer shooter that combined platform-fighter knockback mechanics (in the spirit of games like Super Smash Bros.) with gunplay instead of melee combat — rather than depleting a health bar, players are knocked off platforms by gunfire, with the last combatant standing winning the round. That platform-fighter-meets-shooter hybrid gave it a distinct identity among browser multiplayer games of its era.
Its local multiplayer support made it a popular choice for couch-style competitive play in browsers at a time when most online shooters required a network connection, letting friends compete directly on the same keyboard.
The objective is to knock opposing players off the stage using gunfire-driven knockback, with the last player remaining on the platform winning each round.
Its platform-fighter-meets-shooter format makes for exciting local multiplayer battles. GBK Games also has Getaway Shootout for more chaotic multiplayer action.