Single-player games like Immortal Defense
Below are 9 single-player Steam games similar to Immortal Defense, 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 Immortal Defense page.
Ranked picks
- 1
Turnament
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
You are a space mining apprentice with a bright future ahead. However, your superior Commander Neek would rather watch a movie than teach you anything. Can you collect crystals and survive on your own?
- 2
Particle Fleet: Emergence
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
Build and design your own fleets and stand opposed to the Particulate in this physics/strategy/RTS/fleet hybrid. Build partially destructible and self repairing ships that interact with enemies less controlled by some scripted logic and more driven by a real time massive physics particle simulation.
- 3
Mechs V Kaijus 2
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
Mechs V Kaijus 2 is an Hybrid Tower/Base defense, with army vs army (tug of war style) tactics. From the cockpit of a mech, to build a huge base with Reactors, Mines and all type of tower army factories and super weapons.
- 4
Geometry Defense: Infinite
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
Geometry Defense: Infinite is a classic infinite tower defense game where you must build a maze to slow enemies and build towers to destroy them. An action-packed and engaging game requiring focus to take on challenges and test your skill.
- 5
Toast Time
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
Toast Time is a throwback to the golden age of video games where old-school homebrew titles fused arcade action with a distinctly British sense of humour.
- 6
Death by Game Show
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
Death by Game Show is a frenetic strategy game where your reactions and decisions matter. There is no hand of god, instead you're dropped into the action against a 26th century chaos droidgasm. Prove your smarts, win your freedom, and survive Death by Game Show.
- 7
AI War: Fleet Command
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
"You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost. AI death squads stand watch over every planet and every wormhole, the few remaining human settlements are held captive in orbiting bubbles, and the AIs have turned their...
- 8
Construct: Escape the System
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Indie with Immortal Defense.
„First person platforming gameplay at its very best!“ Construct: Escape the System is a sci-fi themed first person platformer that sees you trapped in a computer system, trying to escape. Explore the system and discover the 8 empowering 'ability orbs'.
- 9
Caves of Qud
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
Inhabit a deeply-simulated science fantasy world and chisel through layers of thousand-year-old civilizations. Build a character from over a hundred mutations and cybernetics. The award-winning sandbox roguelike & RPG full of robots, deep lore, and sentient plants.