Heart of our time.
Complete a level under 20 seconds - Yars: Recharged
Shoot the Zorlon Cannon 100 times - Yars: Recharged
Destroy 150 basic turrets - Gravitar: Recharged
521/3,058425/1,0007/15
272/2,244180/1,0004/19
1,067/1,435790/1,00021/27