Undead Empire: Hellfire

Undead Empire: Hellfire is essentially the same game as its predecessor Undead Empire. After the heroes beat Dr. Scythe's zombie hordes they enter his dungeon to give him the rest. And meet more zombie hordes. The only additions are voice acting, the characters now have an additional starting weapon besides the standard pistol with unlimited ammo and the map has lava areas which should not be touched.

In traditional twin-stick shooter fashion, the goal is to kill everything which moves (except potentially present co-op players of course). Each kill rewards money which is used between rounds to purchase additional weapons, ammo, turrets, weapon upgrades or health refreshments. Then the next wave with more zombies, eventually joined by other creatures like crows, begins. Killed enemies may leave money or ammo pick-ups behind. The six characters have different special abilities, e.g. extra health or a higher chance for cash extras..

Besides story mode, there is a survival mode: Equipped with a weapon with unlimited ammo (which one depends on the character), the goal is to score as many points as possible. The first enemy contact ends the game.