Waiting on You
Uncommon39.4%ObjectiveOptionalSingle-player
Killed an enemy that's had its armor repaired in Unconfirmed.
Some enemies in Unconfirmed have shields or armour that regenerate if you stop shooting them. Damage one (a shielded Elite works well), back off and let its armour visibly restore, then kill it - the killing blow has to land after the armour has come back. Strip an Elite's shield, break contact until it recharges, then finish it off.