Gameplay

The Enemy of my Friend

From Halopedia, the Halo wiki

The Enemy of my Friend

The Enemy of my Friend is an achievement in Halo: Spartan Assault, exclusive only to the Xbox One version. It was released along six other new achievements in December 2013. The achievement is awarded when a player gets a higher individual score than their partner on all co-op missions. It is worth 100 Gamerscore and is represented by a circle with a trophy inside it.[1]

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