Top similar games like Starheim:

Entropia Universe is a unique massively multiplayer online game (MMO) where virtual assets hold real-world value and players can participate in a thriving virtual sandbox economy.

An open world looter shooter. Shoot, loot, and defend yourself against others in a post catastrophic mountain environment!

PHANTOM GALAXIES™ is an epic sci-fi adventure with thrilling mecha combat. Choose between four distinct Starfighter classes and diverse weapons and gear. Once enemies, the intergalactic empires of humanity band together to battle lawless pirate factions amid war torn space!

You're a Junker pilot. Prove your space combat skills in our free-to-play, post-apocalyptic, multiplayer arenas. Vanquish your enemies in King of the Hill style online PvP battles. Earn zBits to unlock new and exclusive ships. Coming soon: Craft and customise your ship to your unique play style.

Gravebound - the post-apocalyptic extraction shooter where humanity’s biggest mistake wasn’t nuclear war… It was giving your toaster Wi-Fi! Load in, scavenge loot, and fight through mechanical madness — extract alive and keep your gear, or dive deeper for bigger rewards (and even angrier appliances)

Massive ground and space battles with hundreds of units. Seamless landings on huge spherical planets. Interplanetary flights with explorable ship interiors. Boarding vessels anywhere in combat, space or surface. All in a single-server PvE co-op space-sim shooter.

PIONER drops players into a vast, grim world, where survival hinges on exploration, crafting, and smart resource management. As an MMO FPS, it offers both PvE missions and intense PvP zones, with unique crafting mechanics, hundreds of weapons and a deep story to explore.

Command 25 ship variants with 20+ upgrades in a living, multiplayer galaxy. Explore, trade, mine, and fight epic real-time battles. Forge alliances or betray rivals—your choices shape the universe. Dive into stunning space combat now!

Build anything. Fight anyone. In space. Highly tactical competitive sci-fi combat/building multiplayer free-to-play game. Bit of MOBA, bit of sandbox. Try it out to see for yourself!

The Netcode Conflict is a community-event-driven online multiplayer game. Our goal is to develop and improve the game together with the community. We host regular events where players can win in-game rewards. TNC is still actively in development, and your ideas and feedback help shape its future!

Explore asteroid fields, trade rare resources, and upgrade your ship in Cosmic Miners. Navigate faction alliances, complete missions, and rise through the ranks in a dynamic space adventure where your choices shape your path to cosmic power.

The ultimate space sandbox. Participate in epic fleet battles, form alliances, strive to dominate entire galaxies and harness the universe’s resources for your industrious empire or the destruction of others. Customise your experience, the universe is yours!

Elyon is an open-world action-combat MMORPG set in the continent of Harth, where the two sovereign realms, Vulpin and Ontari, are at war for the control of a portal that leads to paradise.

Decimated is a third-person online survival game set in a post-apocalyptic sci-fi world where players scavenge, fight, and team up in a hostile open world. Featuring PvP, PvE, missions, and vehicle combat, it’s a dynamic sandbox of danger, strategy, and exploration!

Command a fleet of ships to hunt aliens, trade resources and loot treasure! Form corporations with your friends while fighting a never-ending intergalactic war in this open-world online space adventure!

Take control of the helpless beings on the island and guide them. Survive, grow and continue the course of life. Don't let the harsh reality of mother nature take you down.

Epoch Ultra is an exciting new survival game that challenges you and your friends to persevere through a dystopian cyberpunk future. Build, craft, and fight to shape the places around you and become the ultimate architect to the fate of your world.

A third person, sci-fi, looter shooter. Reclaim earth from robotic enemies. Level up, gain skill abilities, and fight for the right of our very existence.

P.R.O.T.O.C.O.O.L. It is a multiplayer TPS game with fantastic and colorful graphics, developed by a small team. Fight across multiple game modes and ever-growing maps. Take to the Field, Fight and Survive!

Null anchor is a space-sim-lite where you fly, fight, scavenge, steal, trade, refuel, upgrade, repair, evade cops, hunt bounties and run, because you can't hide.

Pilot your own Spaceship in this Sci-fi Space Shooter game! Shoot Asteroids to collect Antimatter, Metals, and Pickups! Use the Metals and Antimatter you collect to upgrade your Spaceship! Level up to unlock stronger Metal tiers to collect, craft or buy Parts from the Store! Survive endless Space!

EV2 is a Open World, looter-shooter set in the frontier where cutting-edge technology meets the remnants of an ancient civilization. Defend humanity against a relentless global infestation of the Hive.

Return to the world of high-octane mech combat in Hawken Reborn. Construct your ultimate war machine and shoot your way through hordes of enemies to uncover the mysteries of Ilall in this brand-new Free-to-Play PVE mech game.

Gravity in Space is an acurate-physics-based spacecraft flight and combat simulation. Learn how to use gravitational forces to navigate through surreal worlds, while you outplay your enemies and shoot them.

GRAV is a sand box experience where you explore a multitude of planets, hunt strange alien creatures, build and defend outposts, craft weapons and armor, and attempt to survive against other players in a hostile environment.

Cut through fungal aliens in this hyper-customizable, mission based looter shooter. Hundreds of hand-crafted upgrades, 4-player co-op, and a little roach man. What’s not to love?

Warspace 2 is a 1-4 player CO-OP space shooter with RPG elements, open-world and procedurally-generated galaxy. You can trade, craft, and fight your way through a universe, either solo or with friends.

A classic fantasy MMORPG powered by uMMORPG—discover dungeons, fight powerful creatures, forge rare equipment, and shape a living world alongside hundreds of players.

Destiny 2 is an action MMO with a single evolving world that you and your friends can join anytime, anywhere, absolutely free.

A fun little space shooter inspired by the 1979 classic Asteroids.

Get ready to embark on a thrilling space adventure across the cosmos, where you'll explore new planets, engage in thrilling space battles, and shape the fate of humanity among the stars.

Wildgate is a PvPvE multiplayer shooter that blends tactical ship-to-ship combat with fast-paced first-person action. Evade deadly environmental hazards, search for powerful weapons and ship upgrades, and be the first crew to escape with the Artifact... or the last crew left flying.

Catch, train, and fight in real-time PvP arenas. Explore a dangerous open world, tame unique creatures, gather loot - and escape alive.

The Universe is yours. SpaceCraft is an online space exploration and building game. Explore a vast galaxy of solar systems and planets, mine and craft resources, design and build ships, automate planetary bases and interplanetary logistics, trade and cooperate.