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
DG2: Defense Grid 2
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.
- 2
Anomaly Defenders
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
Anomaly Defenders is the closing installment of the Anomaly series. The original incarnation of the Tower Offense sub-genre had players controlling humans fighting alien invaders. Now, the tables have turned. The human counterattack is underway and the alien homeworld is under threat.
- 3
2112TD: Tower Defense Survival
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
Get ready for the ULTIMATE tower defense onslaught. Build, deploy, research and upgrade your defenses in this epic, old school RTS inspired sci-fi adventure.
- 4
Unstoppable Gorg
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
- 5
Revenge of the Titans
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Action and Strategy with Immortal Defense.
The ultimate mash-up of Real-time Strategy and Tower Defense!
- 6
Defense Grid: The Awakening
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
Defense Grid: The Awakening is a unique spin on tower defense gameplay that will appeal to players of all skill levels. A horde of enemies is invading, and it's up to the player to stop them by strategically building fortification towers around their base.
- 7
Radiant Defense
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
MILLIONS OF ALIENS WILL DIE!Radiant Defense is a tower defense game set in a vibrant universe invaded by countless alien hordes.Build your space fortress any way you wish, set up wide variety of weapons and traps and let the invasions begin!
- 8
Creeper World 3: Arc Eternal
Single-player alternative to Immortal Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Immortal Defense.
Creeper World 3 is what happens when cellular automata takes over a strategy simulation. Instead of discrete units that attack your base, a fluid-like substance spreads over the terraformable terrain. Your base, your weapons, your strategy... you must adapt them all.
- 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.