Single-player games like Planetary Defense: An Orbital Turret Defense System
Below are 8 single-player Steam games similar to Planetary Defense: An Orbital Turret Defense System, 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 Planetary Defense: An Orbital Turret Defense System page.
Ranked picks
- 1
Exo-Rail
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Strategy with Planetary Defense: An Orbital Turret Defense System.
Build up your Armored Train and fend off thousands of aliens in a faraway star system. In this tower-defense bullet-heaven, you will choose your carriages, upgrade your train, and rain down explosives to maximize defensive firepower.
- 2
Blasteroids
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Strategy with Planetary Defense: An Orbital Turret Defense System.
Blast your way through waves of space debris in order to reach what is waiting for you on the other side. Find your fighting style with multiple unlockable ships in this fast paced space adventure!
- 3
XenoFeud
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Indie with Planetary Defense: An Orbital Turret Defense System.
XenoFeud is an insane top-down twin-stick arcade alien shooter, where you must survive hordes of alien intruders while defending a mysterious object in space.
- 4
Unearthing Invasions
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Strategy with Planetary Defense: An Orbital Turret Defense System.
A 3d tower defense game set in space. Protect the last resource outposts from the ongoing Alien attacks! Can you hold out in these ever increasing difficult waves of enemies and protect the last of your resources and Energy?
- 5
Night Light
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Strategy with Planetary Defense: An Orbital Turret Defense System.
Defend against the creatures of that night! Protect yourself and your lamp by building and upgrading your base. Equip yourself with the best weapons to deal with the incoming waves.
- 6
HyperFeat
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Indie with Planetary Defense: An Orbital Turret Defense System.
A top down 2D space shooter bullethell with roguelike elements awaits you. Dodge, weave and shoot your way through waves of enemies while gaining upgrades trying to survive as long as possible.
- 7
Rombykon
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Strategy with Planetary Defense: An Orbital Turret Defense System.
Become Romby, a tiny crystal lost in space! Survive and defend the crystal against dark waves by upgrading crazy weapons, planting strange flowers, and using tarot cards. Explore constellations, defeat bosses, and unlock over 100 unique skills.
- 8
Star Duality
Single-player alternative to Planetary Defense: An Orbital Turret Defense System — playable solo, no multiplayer required. Shares Action and Strategy with Planetary Defense: An Orbital Turret Defense System.
A quick arcade-style shooter where you constantly have to weigh choices between improving your stats, expanding your mines, building your defenses or going on the attack, before the enemies either take your resources or overrun you