

When upgraded via the Pack-a-Punch Machine, the CRBR-S becomes the CRBR-TRN Duality, gaining increased damage and ammo capacity. Lastly, whenever the player depletes all of the ammunition of a mod kit, the kit will automatically detach from the weapon and revert back to the base CRBR-S. Additionally, each version of the CRBR-S features an artificial intelligence that speaks as either Elizabeth Grey, Oskar Strauss or Mackenzie Carver, and will react to how the player uses the weapon.


Should the player have a mod kit already installed, the player can switch it out by picking up another mod kit alternatively, picking up the same mod kit as the one currently equipped will replenish ammunition. Each mod kit will give the CRBR-S new functionalities the Blazer mod kit will convert the CRBR-S into an assault rifle that fires a concentrated beam of blue powerful energy, the Diffuser will convert the CRBR-S into a shotgun that fires a horizontal flechette of five green energy projectiles, and the Swarm mod kit will convert the CRBR-S into a handheld cannon that fires a twist of two yellow explosives in two rapid bursts, which can additionally lock onto enemies when aiming at them through its unique sight. Uniquely, the weapon can be modified on the fly using mod kits that can be dropped from zombies occasionally. In its base form, the CRBR-S comes equipped with a Copy-Cat companion module, a floating sphere that ejects from a port in the center of the weapon and rotates around it whenever the CRBR-S is fired, the Copy-Cat will fire an additional shot at no expense. The CRBR-S is Requiem's first take on an experimental wonder weapon, and was designed and created by its Containment and Security Division on January 11th, 1985.
