Find all the hidden collectibles.
Unlocked: 26 Mar 2011 14:29:20
STORY TELLER
20Watch each comic without skipping.
Unlocked: 26 Mar 2011 13:40:57
Finish a chase level with at least 75% of the Ecto-shield up.
Unlocked: 26 Mar 2011 06:01:16
Unlock every level and defeat the final boss.
Unlocked: 26 Mar 2011 05:25:33
COLORBLIND
20Kill a Slime Abomination with the wrong weapon.
Unlocked: 26 Mar 2011 05:02:49
HERO
10Revive any teammate 20 times.
Unlocked: 26 Mar 2011 04:19:01
Defeat the Subway Smasher.
Unlocked: 26 Mar 2011 03:42:08
FULL HOUSE
20Finish an online level with the help of 3 other players.
Unlocked: 26 Mar 2011 03:16:20
SPEED DEMON
15Get 100% score with the trap.
Unlocked: 26 Mar 2011 03:16:12
TEAM OF FOUR
15Play with each character.
Unlocked: 26 Mar 2011 02:41:26
ROOKIES
10Finish the first level.
Unlocked: 26 Mar 2011 02:31:13
ROCKSTAR
10Destroy all the expensive LCD televisions in the hotel.
Unlocked: 26 Mar 2011 02:24:22