Finish a chase level with at least 75% of the Ecto-shield up.
Watch each comic without skipping.
Kill a Slime Abomination with the wrong weapon.
Unlock every level and defeat the final boss.
Get 100% score with the trap.
Find all the collectibles hidden inside objects in each level.
Play with each character.
Revive any teammate 20 times.
Defeat the Subway Smasher.
Finish an online level with the help of 3 other players.
Finish the first level.
Destroy all the expensive LCD televisions in the hotel.
