1st~Night of the Raving Dead
A corny Villain, some nice settings, and seeing Sam and Max turn into Zombies was hilariously cool. Also, Max grooving on the Dance floor is so amazing to witness.
The music is so amazingly retro, the settings are a cool recreation, and the Text adventure was brilliant.
3rd~Chariots of the Dogs
Traveling through time was amazing, and there were some amazing moments and hilarious jokes in this one.