Gun-Dec is an action-adventure game for the Nintendo Entertainment System that combines side-scrolling platforming, driving sequences, and rail-shooter mechanics. Players control the protagonist, Hart, who can jump, climb, and duck while wielding various weapons such as a katana, pistol, and grenades, each with limited ammo except for the katana. Power-ups include ammunition, health items, and coins. The game features diverse gameplay elements, enhancing the overall experience.
Vice: Project Doom is a game that features side-scrolling platform sequences, overhead driving modes and rail-shooter stages. In driving stages Hart's vehicle can accelerate or slow down and fire his weapon straight ahead. During side-scrolling sequences, Hart can jump, duck, climb or use his selected weapon. Weapons that can be selected include a Katana sword, a pistol and a grenade-type weapon. These weapons feature limited ammunition with the exception of the katana. Power-ups include ammunition, coins, and health. In rail-shooting stages, similar to Operation Wolf, Hart can shoot enemies with his gun or throw grenades and pick up items by shooting at them.