Undead fortress is a simple and pure first-person shooter game that tests players' shooting reflexes and upgrade combinations.

Players take on the role of a survivor in a post-apocalyptic world, constantly fighting against the pursuit of bio-armies and zombie waves, searching for supplies and strengthening their own chip abilities.

Game features:

• Challenging opponents:

  Bio-armies can use various firearms, engage in hand-to-hand combat, and throw grenades. Zombies get stronger over time, with invisible enemies and missile enemies, and more.

• Level objectives:

  Use map resources wisely to survive until the end.

  Gain resources for each enemy killed, double rewards for victories.

  Each additional second survived adds extra loot.

• Chip upgrades:

  Can have 4 types of chips to strengthen themselves and improve combat effectiveness.