Country Justice: Revenge of the Rednecks is a first-person shooter similar in themes and humour to the Redneck Rampage games. In the Yahoo Country in Mississippi, Steve Earl is informed by his cousin Ellie May that her goat Dixie has been stolen. Steve and Sheriff Cletus set out to search for it, but right at that moment the entire county is affected by nuclear waste, dumped in the river by a scientist, mutating all animals and turning the humans into zombies.
Starting from the main, trailer-infested village, the player can attack mutated goats, cows and horses, as well as the zombies with weapons such as a fists, a baseball bat, a pistol, a rifle, different types of shotguns, an M16, a crossbow, dynamite, and a spraycan that becomes a flamethrower when used with a lighter. The action takes place both indoors and outdoors. There is a fixed mission path, but most of the environment can be roamed freely and it covers a lot of terrain with meadows, rivers, bridges, various small buildings, towns and small sites with crashed cars. Earl can travel around using different vehicles such as four-wheelers, pick-up trucks, air boats and semi-trucks. His main truck can be tuned at the local gas station or garage. When driving, the perspective is changed to third-person, except when Steve is in the back of the sheriff's truck manning a machine gun.
Health is restored by drinking Moonshine and the player can also earn extra lives and weapons through optional mini-games, such as a bottle shooting gallery, challenges and races. The main level areas include a trailer park, a swamp boat, a nuclear power plant, a fishing camp, and more. Reaching all areas is quite a task however, as the game is virtually unplayable through clipping bugs, random crashes and other signs of unpolished development. The game manual also mentions a key to reset the area when a character is stuck in the geometry.