Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
- Flying Blind (50 points): Finish a stage with the crosshair off.
- Bow to me (200 points): Attain 5 stars on all story stages.
- No cat left behind (100 points): Complete the final stage and story mode.
- Blistered Feet (100 points): Complete Marathon mode.
- A Survivor is Born (100 points): Reach wave 10 in Survivor Mode.
- Insert Coin (50 points): Complete your first level.
- 99 Problems and a Zombie Ain't One (50 points): Reach a combo of 99 kills in any mode.
- Can't Touch This (50 points): Finish a stage without taking any damage.
- Pound Cake (50 points): Kill 10 enemies with one sledgehammer power-up.
- Pacifist (50 points): Finish a stage without killing a single enemy.
- On Rails (50 points): Finish a stage without ever changing lanes.
- Airborne Appendages (50 points): Get 20 projectile kills in a single stage.
- Half Marathon (100 points): Reach Stage 2-5 in Marathon Mode.