Complete campaign level 1

Complete campaign level 2

Complete campaign level 3

Defeat the first campaign boss

Complete campaign level 8

Complete all 15 campaign levels

Earn 3 stars on any level

Earn 3 stars on 5 different levels

Earn 3 stars on all 15 levels

Clear a level with no base damage

Clear a level without losing a life

Destroy 100 enemies

Destroy 500 enemies

Reach wave 5 in Arcade

Reach wave 15 in Arcade

Select any non-default tank skin

Pick up a shield power-up

Pick up a double-shot power-up

Repair the base with a repair power-up

Destroy 25 enemy bullets with yours

Clear a level while down to 1 life

Clear a level using the Fast skin

Clear a level using the Heavy skin

Clear a level using the Sniper skin

Score 10,000 points in a single Arcade run