Successfully complete the indicated task to unlock the corresponding achievement.

Achievement	How to unlock
Airplane	Clear the Airplane.
Airport	Clear the Airport.
Backdoor Breeze	Gas 100 civilians.
Big Ben	Collect 25 Clocks.
Breakfast of Champions	Munch 100 burritos.
Brown Thunder	Complete the 'Fart' Difficulty.
Burrito Hut	Clear Burrito Hut.
Chomper	Munch 25 burritos.
Cut the Cheese	Complete the 'Toot' Difficulty.
Elevator	Clear the Elevator.
Gas Station	Clear the Gas Station.
Gluteal Tuba	Gas 1000 civilians.
Gym	Clear the Gym.
Hotel	Clear the Hotel.
Lethal Cloud	Complete the 'Shart' Difficulty.
Master of Time	Collect 100 Clocks.
Muncher	Munch 5 burritos.
Parking Lot	Clear the Parking Lot.
Rectal Tremor	Gas 5000 civilians.
Tick Tock	Collect 5 Clocks.
Trouser Trumpet	Gas 500 civilians.
Wedding	Clear the Wedding.