Сollect all trophies
Purchase a THUNDER
Beat the final boss
Use boost 60 times
Purchase all upgrades for one tank
Complete twelve levels
Complete ten levels
Kill 72 monsters
Purchase a RED SHADOW
Beat the second boss
Complete five levels
Don't leave a level after it ends
Purchase a HELL BUSTER
Beat the first boss
Collect 150 photons
Collect 100 photons
Collect 50 photons
Purchase your first upgrade