Perform a Double Kill on any game mode.
Perform a Triple Kill on any game mode.
Score the first kill on a match.
Eliminate the dominant enemy.
Reach the Unstopable status.
Reach the Godlike Status.
Taunt one of your enemies.
Fight in a Sudden Death brawl.
Get 5 kills using the Meteor.
Get a kill on a frozen enemy.
Eliminate 20 enemies using the Megaton Hook.
Eliminate 4 enemies using the Microwave.
