Single-player games like Universe Horizon
Below are 9 single-player Steam games similar to Universe Horizon, 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 Universe Horizon page.
Ranked picks
- 1
Orbitmine
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Universe Horizon.
Orbit a planet, fire your laser, and mine it to the core. Upgrade your ship and conquer seasonal hazards across four unique zones. A satisfying incremental mining game set in space.
- 2
Idle Factory
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Indie with Universe Horizon.
Idle can also build your industrial empire.
- 3
Unnamed Space Idle
Single-player alternative to Universe Horizon — playable solo, no multiplayer required.
Destroy endless waves of alien ships that have all but wiped out humanity in this long form, unfolding, sci-fi idle game. Customize your ship with different weapons and defenses to defeat specific enemy types and utilize a ton of different systems to increase your overall power.
- 4
Military Incremental Complex
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Strategy with Universe Horizon.
Make weapons, make money. An active incremental game where you amass as much money as you can by starting a Military Industrial Complex company. Produce multiple different weapons, research upgrades, manipulate the stock market, and lobby the government for favors.
- 5
Particul
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Universe Horizon.
Click to mine particles and watch your pile grow. Turn resources into profit, automate extraction, research new technologies and trade. Can you mine the rarest particle and ascend? There is just one way to find out.
- 6
Fill Up The Hole
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Universe Horizon.
Turn trash into cash in a dystopian world! Fill Up The Hole is a short incremental game where you build a city, automate garbage production, and toss it into a magical hole for profit.
- 7
Microcivilization
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Universe Horizon.
Incremental clicker strategy, where you expand, construct, research, fight, collect heroes and make choices between good and evil. Ascend through difficulty tiers by playing through challenge campaign going back and forth through history. Mammoths included.
- 8
CompactO - Idle Game
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Universe Horizon.
CompactO is an addicting idle game where you create colorful squares on a plane. Dominate the 3D Realm and infuse your planes into complex shapes to buy tons of upgrades!
- 9
Melvor Idle
Single-player alternative to Universe Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Universe Horizon.
Inspired by RuneScape, Melvor Idle takes the core of what makes an adventure game so addictive and strips it down to its purest form! This is a feature-rich, idle/incremental game combining a distinctly familiar feel with a fresh gameplay experience. Maxing 20+ skills has never been more zen.