You are a super powered soldier trying to kill an army of made up of cyborg zombies, bear cavalry, and spetsnaz who want to take over the world.
You're side arm is a GAU-8/A Avenger that fires explosive shells coated in depleted uranium. Your main weapon can be anything from a M-29 Davy Crockett to the cannon of a tank you ripped out of a tank after using the tank as a club to beat a giant mecha to death. There will be RPG elements such as learning to talk to speak bear so you can use aforementioned bear cavalry to eat the zombie cyborgs. An asteroid you pulled out of space with a gravity gun is fine too.
You're side arm is a GAU-8/A Avenger that fires explosive shells coated in depleted uranium. Your main weapon can be anything from a M-29 Davy Crockett to the cannon of a tank you ripped out of a tank after using the tank as a club to beat a giant mecha to death. There will be RPG elements such as learning to talk to speak bear so you can use aforementioned bear cavalry to eat the zombie cyborgs. An asteroid you pulled out of space with a gravity gun is fine too.