Kill 10 enemies with one sledgehammer power-up
Complete your first level
Finish a stage with the crosshair off
Attain 5 stars on all story stages
Complete the final stage and story mode
Complete Marathon mode
Reach wave 10 in Survivor Mode
Reach a combo of 99 kills in any mode
Finish a stage without taking any damage
Finish a stage without killing a single enemy
Finish a stage without ever changing lanes
Get 20 projectile kills in a single stage
Reach Stage 2-5 in Marathon Mode
ATTAIN 5 STARS ON ALL STORY STAGES
COMPLETE THE FINAL STAGE IN STORY MODE
COMPLETE MARATHON MODE
REACH WAVE 10 IN SURVIVOR MODE
COMPLETE YOUR FIRST LEVEL
REACH A COMBO OF 99 HITS IN ANY MODE
FINISH A STAGE WITHOUT TAKING ANY DAMAGE
KILL 10 ENEMIES WITH ONE SLEDGEHAMMER POWER UP
FINISH A STAGE WITHOUT KILLING A SINGLE ENEMY
FINISH A LEVEL WITHOUT EVER CHANGING LANES
GET 20 PROJECTILE KILLS IN A SINGLE STAGE
REACH STAGE 2-5 IN MARATHON MODE
FINISH A STAGE WITH THE CROSSHAIR OFF
Attain 5 stars on all SP levels
Complete the Final Stage in Story Mode
Complete Marathon Mode
Reach Wave 10 in Survivor Mode