Single-player games like Planet Killer
Below are 8 single-player Steam games similar to Planet Killer, 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 Planet Killer page.
Ranked picks
- 1
Seven Suns of Orion
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
A fast paced bullet heaven, control your Sci-fi spaceships with semi-newtonian physics. Last 7 minutes against the drone armada until their boss arrives and fight your way to freedom! Use planetary gravity and other hazards to dodge superior numbers. Collect and combine weapons for maximum firepower
- 2
Crush The Rebellion!
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
The galactic empire is under siege from the rebel scum in all directions! Fight through endless waves of rebel ships using all of the weapons and resources at your disposal as you execute your sole orders: to Crush The Rebellion!
- 3
Slag
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
You are tasked with servicing Terraformer Ai cores. To do this you will have to blast your way through the automated defense system. Turn the bots you come across into slag and get what "res" you can out of them as you will need it to load out your tank with different weapon and mods systems.
- 4
Alien Space Bastards
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
Alien Space Bastards is a procedurally generated 3D arcade style shooter. The aliens are attacking in force and you must utilize all the weaponry you have to survive the onslaught and bring piece to the galaxy. Multiple power ups will assist you on your suicide mission, good luck and fight bravely!
- 5
ComboChain Pulse
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
Survive relentless waves in a fast-paced top-down bullet hell shooter. Chain combos, dodge chaos, and master skill-based combat where every second matters.
- 6
Deep Space Survivor: Endless Starfield
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
"Deep Space Survivor: Endless Starfield" is a survivor-style game. Your interstellar battleship accidentally enters an unknown universe, fighting its way through endless enemies, roaming multiple star systems, and collecting meteor resources to forge your ultimate orbital weapon.
- 7
Neon Swarm
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
A pure neon arcade survivor-like: dodge swarming hordes, dash through walls of bullets and forge devastating builds from 200+ synergizing items. 6 ships with unique ultimates, 8 mega-bosses, rising Threat levels, endless mode and a daily challenge.
- 8
Star Striker
Single-player alternative to Planet Killer — playable solo, no multiplayer required. Shares Action with Planet Killer.
Free-Flight, Arcade Space Shooter, Action Roguelike. Jet through stylized arenas facing increasingly deadly starships while pushing your power to the absolute limits. Use synergistic weapon mods and game-changing relics to bend reality and take down the giant space wrym Digamora or die trying.