Single-player games like Immune Response
Below are 8 single-player Steam games similar to Immune Response, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Immune Response page.
Ranked picks
- 1
Zap Blastum
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
Zap always dreamed of saving the galaxy, and now it's time! Snap into cover, lock onto targets, and outsmart an army of robots in this fast-paced top-down cover shooter. The odds are against you, but anyone can be a hero.
- 2
Nectar Wars
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
An explosive Shoot ‘Em Up like no other, Nectar focuses on five hummingbird sisters, each with their own playstyle. Defeat powerful bosses, unlock new cosmetics, compete in online leaderboards, and save your world from the invading bee army!
- 3
Doctor Nanobot
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
Small robot, big battles! Doctor Nanobot is a retro style arcade shooter where you take on bacteria, viruses and more using a variety of high tech medical weaponry!
- 4
#Funtime
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
#Funtime is an explosive twin-stick shooter where shooting isn't your only weapon. Swap your ship's color to destroy enemies, avoid damage, and ultimately control the battlefield.
- 5
Plasma Sky
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
This week, every pilot on Earth flies the same new seeded run: identical enemies, identical drops, pure skill. Flow through alien formations, arm your wingmen, and power up when you can. Out-score your friends in Plasma Sky, an arcade shmup with over 100 handcrafted levels. Blast into the neon sky!
- 6
Project Nebula
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
An explosive arcade arena shooter inspired by the golden age of Amiga classics. Blast through asteroid fields, destroy alien forces, upgrade your ship, and unleash devastating weapons in a modern reimagining of a timeless genre.
- 7
Genome Guardian 2
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
COMBINE WEAPONS in the microscopic shooter with macroscopic depth. BUILD YOUR NANOBOT from hundreds of parts. SURVIVE the microbial onslaught once more in this psychedelic dive to the Abyss, full of mutations, minerals, anomalies and powerup polyps. SHMUP mode turns it into a vertical shoot 'em up!
- 8
Starfighter Neon
Single-player alternative to Immune Response — playable solo, no multiplayer required. Shares Action and Indie with Immune Response.
You've been dropped into enemy space. Weave your Starfighter between alien spaceships, lasers, asteroids and bombs destroying as many as you can and collecting valuable coins and powerups as you go.