Major Mayhem achievements

Defeat 500 enemies with the Rifle

Defeat 2,000 enemies with the Auto Launcher

Score 150,000 points in Arcade mode

Remove 1,000 hats from enemies that are already dead

Use the Chicken Cannon and wear the chicken hat as the General

Defeat 500 enemies with the Magnum

Defeat 10,000 enemies

Use the Light Machine Gun and wear the red bandana as Rambro

Defeat 500 enemies with the Automatic Sniper Rifle

Score 50,000 points in Timebomb mode

Shoot down 100 enemy jets

Rescue 5 hostages in a single Timebomb game