Major Mayhem achievements

Score 100,000 points in Timebomb mode

Defeat 500 enemies with a Chicken Cannon

Defeat 2,000 enemies with the Magnum

Discover all the multiplier call outs

Earn 3 medals on all Tropic missions in Classic mode

Finish the Desert in Survival mode

Use 5 or more weapons in one Timebomb game

Defeat 500 enemies with the Quadzooka

Finish Metropolis in Survival mode

Score 250,000 points in Arcade mode

Get 1,000 Close shaves

Defeat 500 enemies with the Plasma Rifle