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
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!
- 2
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.
- 3
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?
- 4
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.
- 5
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.
- 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
SENTRY
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.
SENTRY is an action-defense first person shooter where you defend your spaceship against invading aliens. Plot an escape route through hostile space and battle the enemy across your vessel with the support of traps, turrets and environmental destruction.
- 8
Hive Jump 2: Survivors
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.
Become an agent of vengeance in this bullet-heaven action roguelite! You are the lone survivor of your squad, on an alien planet with just your weapon, a jetpack, and the courage to keep fighting. Kill off alien swarms and transform their valuable guts into explosive upgrades and vital utilities.