Complete Episode 1 - "Culture Shock".
Complete Episode 2 - "Situation: Comedy".
Complete Episode 3 - "The Mole, the Mob, and the Meatball".
Complete Episode 4 - "Abe Lincoln Must Die!".
Reality 2.0
20Complete Episode 5 - "Reality 2.0".
Complete Episode 6 - "Bright Side of the Moon".
Complete all episodes of Sam & Max Save the World.
Heard 10 different comments about your unicorn.
Improviser
10In Episode 2, achieve six different cow identities that Mr Featherly will play along with.
In Episode 3, get a perfect score on Whack-Da-Ratz.
Easter Bunny
10In Episode 4, find the Easter Egg.
In Episode 5, attempt to chop up everything in the text adventure with your +2 sword.