Resistance 2 co-op and multiplayer Berserk. In co-op it is only available for the Spec-Ops, while in multiplayer it is availible for everyone. Prototype Ammo will release packages of ammunition around the player when the berserk is activated. These packages will provide ammunition that has a damage modifier which means that each bullet will deal more damage. These packages can be picked up by teammates as well and therefore is a very useful berserk. It is unlocked at level one both in co-op and multiplayer. This advanced ammo replenishes both primary and secondary fire on both weapons of the obtainer therefore combining the Carbine and this berserk would allow an effective kill although the LAARK and Pulse Cannon offer two shots while the Carbine offers one.