Complete three levels
Complete five levels
Destroy 1000 enemies
Complete nine levels
Win at the level of complexity of the "normal"
Destroy 20000 enemies
Unlock the seventh level of the tower
Get the first victory
Unlock the "Champion" difficulty level
Unlock Level 8 Tower
Complete level two
Destroy 5000 enemies
Destroy 10000 enemies
Unlock difficulty level "unreal"
Unlock Level 6 Tower
Destroy 32000 enemies
Unlock difficulty level "hard"
Destroy 100 enemies
Unlock weapons Atom
Complete level seven
Win Arena