Finish the first level.
Finish a vehicle level.
RUSH HOURS REVENGE
Defeat the Subway Smasher.
Get 100% score with the trap.
Destroy all the expensive LCD televisions in the hotel.
TEAM OF FOUR
Play with each character.
Revive any teammate 20 times.
Kill a Slime Abomination with the wrong weapon.
BUSTIN' MAKES ME FEEL GOOD
Unlock every level and defeat the final boss.
Watch each comic without skipping.
DON'T TOUCH THE CAR
Finish a chase level with at least 75% of the Ecto-shield up.
NICE THINKING, RAY
Find all the collectibles hidden inside objects in each level.