Posted by: MasterfulFungus
Grifball is in Action Sack.
You need 50 exp in one playlist for Lightswitch. Spartan Officer requires a global rank of Lt., which is a high skill of 10 and 70 total exp. If you do not unlock Officer when you reach 70 exp total, you should get it when you reach 50 exp in one playlist. You cannot get Officer until you get 50 EXP in a playlist, your global rank is irrelevant. You get lightswitch and officer at the same time.