How do you get the Spartan officer in Halo 3?

Spartan Officer is a Halo 3 multiplayer achievement. It is earned when the player gains 50 experience points in a certain playlist and a rank of at least Lieutenant on Xbox Live. This Achievement gives 25 gamerpoints to the player.

Is there Boost In Halo infinite?

Youll be able to use one XP Boost for 30 minutes of double XP in Halo Infinite. Of course, this XP Boost only doubles experience earned from in-game challenges, so dont pop it preemptively.