Max Ammo is one of the original power-up drops introduced in Call of Duty Zombies and carried into Black Ops 2, released in 2012. The floating green ammo box can drop from defeated zombies and, when collected, refills reserves for the whole team while the announcer confirms the effect. Clips of the call spread through Zombies gameplay videos, montages and soundboards because veteran players associate it with surviving high rounds. It remains a shorthand for a complete refill in gaming culture.