Battle Hardened is a character introduced in Call of Duty: Black Ops 4, where it is exclusive to Blackout. He is unlockable and playable once the player reaches Echelon 80 Prestige.
Battle Hardened is also featured in Call of Duty: Mobile and was added in the game during Season 8 - The Forge as part of a crate. Later, Battle Hardened returned in the Season 11 Anniversary with the uniform Red Shock that was a reward after completing all steps of the Pawn Takes Pawn Easter Egg. Another uniform, Axon, was added in Season 1 - New Order, unlockable through that season's daily login calender.