Purchased a THUNDER
Beated the final boss
Used boost 60 times
Purchased all upgrades for one tank
Completed twelve levels
Purchased a RED SHADOW
Completed ten levels
Yeah! Rock!
Beated the second boss
Killed 72 monsters
Completed five levels
Purchased a HELL BUSTER
Beated the first boss
Collected 150 photons
Collected 100 photons
Collected 50 photons
Purchased your first upgrade