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Immunity

Demo available

AustinDiscovered Sep 21, 2026

About the game

Fight waves of bacteria and viruses as powerful immune cells in this fast-paced survival game. Choose mutations, unlock new characters, build stronger defenses, and protect vital organs before the infection takes over.

Original Steam description

Immunity is a fast-paced survival game where your body becomes the battlefield.

Play as different immune cells, each with their own strengths, abilities, and playstyles, as you fight through waves of bacteria, viruses, and other threats. Every run pushes you to adapt, choose new mutations, and build a stronger defense before the infection overwhelms the organ you are trying to protect.

As you survive, you will collect DNA, unlock new immune cells, and experiment with different combinations of abilities and upgrades. Some builds focus on clearing large groups of enemies, while others reward speed, durability, or carefully controlling the battlefield.

The longer you survive, the more intense the infection becomes. Enemies grow stronger, pressure builds, and protecting both yourself and the surrounding tissue becomes increasingly difficult.

Features:

  • Fast, replayable survival runs

  • Multiple immune cells with distinct playstyles

  • Mutation choices that shape each build

  • Enemies that attack both you and vital organ nodes

  • Permanent DNA progression and character unlocks

  • Increasing difficulty that keeps every run tense

  • A biological theme built around the immune system

Fight the infection, evolve your defenses, and keep the body alive.

Demo and release information

A Steam demo was found at the latest check. Confirm it is still available in your region on Steam before downloading.

Steam demo, playtest and Early Access: what is the difference?

Information & artwork: Steam · Last checked UTC