Grim Reaper is a non-canonical Power-Up. To obtain Grim Reaper, the player must kill a zombie. Grim Reaper is quite rare, like the Death Machine, and usually is only awarded beyond round 10.

For the most part, the Grim Reaper is hard to use effectively, especially within small areas like "Five". Without PhD Flopper it can be very frustrating.

Just like in multiplayer, it has four unguided rockets. The fire rate has not been capped, meaning the player can fire all four rockets in a second. However, its long reload time without Speed Cola can make the weapon almost useless.