Undead Corridor is a fast-paced 2D zombie survival shooter where you fight hordes of undead in confined environments such as corridors, hospital areas, rooms, and streets. As a lone survivor, your goal is to stay alive while managing limited ammunition, keeping enemies at a safe distance, and clearing as many zombies as possible. Different zombie types vary in speed, toughness, and aggression, forcing you to adjust your aim and weapon choice as the pressure increases. Earn in-game money by surviving and defeating enemies, then spend it on stronger weapons that can help you handle increasingly dangerous encounters. The game includes multiple survival modes with different rules and environments, giving you more than one way to test your shooting accuracy, ammo management, and ability to survive under pressure.