Complete each achievement to get the allotted gamerscore.
| Unlockable: | How to unlock: |
| Fashion Show (70) | Unlock every character costume. |
| Monsterologist (20) | Unlock every Bestiary entry. |
| Maniac! (30) | Kill 10,000 monsters. |
| Long, Hard Road Out Of Suburbia (20) | Travel 1,000 kilometers |
| Archaeologist (45) | Collect 72 Specialty Melee Weapons! |
| "It's Mine! ALL MINE!" (25) | Collect 10,000 Monster Tokens across all characters. |
| Trap Assassin (15) | In Zack's House, use your cunning to defeat all of the enemies with traps! (on Thriller or higher) |
| Prowler On The Roof (15) | Collect all weapon parts in Streets of Suburbia. (on Thriller or higher) |
| Did Someone Order Chinese? (15) | Find a way to deal with that pesky Granny evil cat shield! (on Thriller or higher) |
| You Got Fur In The Hyperishdrive (15) | Can you escape the garbage trucks of death without boosting? (on Thriller or higher) |
| Junkyards Just Aren't The Same (15) | Make a mad dash to Bob Zombie! (on Thriller or higher) |
| I Said Turn Off Your Car Alarm! (15) | Destroy all those pesky, loud cars in the Parking Lot with your mech! (on Thriller or higher) |
| The Bodyguard (15) | These gold zombies trust you with their life. Show them you mean business. (on Thriller or higher) |
| When Household Appliances Attack (15) | Show the monster masses that vacuuming can be fun... by using excessive force! (Thriller or higher) |
| Grumpy Old Man (15) | He's old and grumpy, so try to show him you care by not letting him get hurt. (Thriller or higher) |
| Very Sneaky, Sir (15) | Show them you're a ninja of the night when taking back what's rightfully yours. (Thriller or higher) |
