Single-player games like Space Alliance: Frontier
Below are 16 single-player Steam games similar to Space Alliance: Frontier, 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 Space Alliance: Frontier page.
Ranked picks
- 1
Grey Galactic
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Space Alliance: Frontier.
Grey Galactic is a real time strategy game in space where you build up your planets and ships to conquer your enemies. Develop your empire and fleet of spaceships to destroy your enemies and take over the galaxy! Do you have what it takes to become the best Fleet Captain the UFMC has ever seen?
- 2
SYNCHRONIZERS: UNDEAD MARINES
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Space Alliance: Frontier.
"SYNCHRONIZERS: UNDEAD MARINES" blends high-quality Three-Lane Tower Defense with Reverse Tower Defense gameplay. Command your units in a thrilling narrative reminiscent of a StarCraft and Plants Vs. Zombies fusion! Your choices will forge the path to victory—or defeat.
- 3
Swarm Queen
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Space Alliance: Frontier.
A quick-to-learn but challenging real-time strategy game where you spawn an army of space-bugs that control themselves.
- 4
Calyx
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy with Space Alliance: Frontier.
A strategy game with a new kind of enemy, Calyx puts you in charge of a space mining outpost, locked in battle against powerful plant-aliens. Build your base, gather resources, assemble your forces, and take on the Calyx. With only an out-of-date AI for company, can you survive?
- 5
Leave No One Behind: Ia Drang
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy with Space Alliance: Frontier.
Leave No One Behind is tactical real time strategy war game. Experience some of the hardest battles fought during the Vietnam War in 1965 between US Army and the Army of the Northern Vietnam for landing zones X-Ray and Albany and for Plei Me special forces camp.
- 6
Line Of Defense Tactics - Tactical Advantage
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Space Alliance: Frontier.
A real-time strategy combat game based on the world of the Line Of Defense. Command a team of four Galactic Command marines in highly classified missions in space and on planets.
- 7
Power & Revolution 2023 Edition
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy with Space Alliance: Frontier.
The latest edition of the ultrarealistic world simulator where you play as the Head of State or as the opposition! New Additions: dive deeper into the war in the Ukraine with artillery, trenches, mines, troop morale, etc; detailed immigration management; the justice system; and children.
- 8
Mechs & Mercs: Black Talons
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Space Alliance: Frontier.
You are the commander of the Black Talons company, currently stationed in the Oberon system. After an eventful campaign, the military Tzanar Union has overrun the planet of Genai and blocked all departure from the system: leaving you and the Black Talons stranded.
- 9
Office Battle
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Indie with Space Alliance: Frontier.
Welcome to Office Battle! Many workers will lose their job because a layoff is happening very soon in your office. That is why "Big B" decided to organize a competition and the winners gets to keep his job. But don’t think that it will be easy.
- 10
Darkness Assault
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Indie with Space Alliance: Frontier.
The number of missing in the city increased. People talk about the experiments on human beings. And now, only you can figure out if it was true. Especially because you have no choice. Mysteriously, you find yourself in a terrible location 40 meters underground. Your name is Katrine, and you do not remember anything about your past.
- 11
Botology
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Indie with Space Alliance: Frontier.
A company is currently in development of robots for the new generation - Botology, conduct tests for a new system for the remote control of robots. The purpose of the company is to help future potential buyers explore the remote space systems.
- 12
Shift
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Space Alliance: Frontier.
It's a fun puzzle game. You have to connect as many figures as possible together. Use yellow "shifters" to change direction of the line. Get more points for longer line.
- 13
Redemption: Saints And Sinners
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required.
Squad of professional soldiers was sent to scout distant space station. After the accident, that station were evacuated long ago and all the exits were blocked with power shields. But the incoming signal from there made the Commander concerned. Squad's ship were fired upon and the survivors woke up at the station.
- 14
ROMBY
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Space Alliance: Frontier.
In ROMBY you will earn points by placing 4 and even more figures of one color in a straight line. Earn more points and open all hidden girls. Trust me it won't be easy.
- 15
Bad Day
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required.
Bad Day - an endless runner with unique combination of 2D graphics and 3D environment. Compete with players from all around the world. But do not forget that the difficulty increases as you progress through.
- 16
GG Puzzler
Single-player alternative to Space Alliance: Frontier — playable solo, no multiplayer required. Shares Indie with Space Alliance: Frontier.
GG Puzzler is a classic puzzle/mosaic game. You gonna need to build full picture of the girls out of small fragments using only small reference and your imagination.