Redemption Arc

Redeemed are tougher, special enemies throughout the Shattered Space DLC. They spawn randomly and are uncommon but not super rare.

If you don't get 10 through completing the DLC normally, just try exploring more - or flying to and landing on other random places around the planer Va'ruun'kai, and the random camp/POI spawns should have some until you reach the 10 kills required for this achievement.