Have a good chuckle before the title screen

Destroy a Martian Mothership

Clear stages 1-4 and reach the first checkpoint [No Passwords]

Clear stages 5-8 and reach the second checkpoint [No Passwords]

Clear stages 9-12 and reach the third checkpoint [No Passwords]

Clear stages 13-16 and reach the fourth checkpoint [No Passwords]

Clear stages 17-20 and reach the fifth checkpoint [No Passwords]

Clear stages 21-24 and reach the sixth checkpoint [No Passwords]

Clear stages 25-28 and reach the seventh checkpoint [No Passwords]

Clear stages 29-32 and reach the eighth checkpoint [No Passwords]

Clear stages 33-36 and reach the ninth checkpoint [No Passwords]

Clear stages 37-40 and reach the tenth checkpoint [No Passwords]

Clear stages 41-43 and reach the final checkpoint [No Passwords]

Defeat Dr. Tongue and enter the credits stage! [No Passwords]

Complete the credits stage [No Passwords]

Save all ten cheerleaders in Slumber Party Massacre.. and crash the game. [Passwords Allowed]

Unlock the first bonus stage: Worm Welcome [Passwords Allowed]

Unlock the third bonus stage: House by the Graveyard [Passwords Allowed]

Unlock the fourth bonus stage: Mall of the Wild [Passwords Allowed]

Unlock the fifth bonus stage: Tomb it may Concern [Passwords Allowed]

Unlock the sixth bonus stage: Day of the Tentacle 2 [Passwords Allowed]

Unlock the seventh bonus stage: Fangs for the Memories [Passwords Allowed]

Unlock the eighth bonus stage: Fungus Among Us [Passwords Allowed]

Unlock the ninth bonus stage: Problem Child [Passwords Allowed]

Unlock the final bonus stage: The Aisle of Dr Tongue [Passwords Allowed]

Destroy the Snakeoid in Worm Welcome [Passwords Allowed]

Beat the game without ever going below 6 HP [Medkits Allowed] [No Passwords] [Bonus Levels Required]

Beat the game while saving at least 6 neighbors per level [No Passwords]

Defeat a Vampire

Destroy a Chainsaw Maniac

Destroy Frankenstein's Monster

Reach a score of 250000

Reach a score of 100000

Reach a score of 500000

Reach a score of 750000

Have all Neighbors killed on Zombie Camping Trip