Top similar games like Stellar Abyss:

Explore thousands of planets, gather resources, craft warships, and battle space pirates. Form factions, conquer worlds, and build your galactic empire in this vast sci-fi sandbox. Captain — are you ready?

Captain your ship in a persistent, true-scale Milky Way. Explore, trade, mine, hack, or turn pirate. Outfit your ship, establish stations and planetary structures, and direct MI and programmable AMI systems to keep operations running while you're logged out.

Player bases are located on asteroids, which travel within the Oort Cloud. Once they’ve acquired the appropriate skills, players can control their asteroid’s movements. Mass-combat enthusiasts will love the Arena: here, players can battle it out against alien races or other Astro Lord players.

Design unique spaceships and build the ultimate space mining fleet as you team up to battle for resources and glory in this massively multiplayer action strategy set in an alien wasteland.

Kron Wars is a persistent browser-based sci-fi MMO where players trade, mine, build corporations, wage wars, hunt bounties, and control entire sectors across massive player-driven universes with dynamic economies and tactical space combat.

Space. Ships. Resources. Trading. Production. Combat. Mine ore, haul cargo, and find profitable trade routes. Buy and capture ships, build your fleet, construct stations, and develop your production. Start with your first ship. Build your empire!

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.

Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.

Andromeda is a hybrid between a Space 4X and an MMO. An online universe sandbox with 2 galaxies full of planets to colonize. Build structures like Mines to generate resources to build ships and engage in fleet battles with NPCs and other players, or just sit and chat with the friendly community.

NOVA WARP is a free-to-play open-sector multiplayer game with three factions. Team up against the creatures of deep space, fight for sectors, resources and prestige, master co-op dungeons, level your ship and dive into massive battles. Conquer the stars, pilot!

A small online Space RPG. Made to enter space! Fly around with others and level up. Battle against other ships or do other missions.

In Star Trek Online, the Star Trek universe appears for the first time on a truly massive scale. Players take the captain's chair as they command their own starship and crew. Explore strange new worlds, seek out new life and new civilizations, and boldly go where no one has gone before.

The lite space-sim. Fly, fight, and trade through a galaxy where the prices and borders came from 700,000 days of simulation that keep ticking.

Captain your own space ship and roam the galaxy in 3D in this tactical space simulator with tons of RPG depth ! Space has never looked so inviting - but images can betray...It has been two years since the end of the second Gemini war, the situation in the wartorn system is further from resolution than ever.

Starship Empire is an intense PvP-filled space MMO where you not only lead your ship into epic battles, but manage the entire crew inside!

Aberoth is a fantasy massively multiplayer online role playing game with charming retro graphics and tons of freedom.

《决战万界山》是一款在洪荒武道沙盒世界中收集盖世神功的宗门团战网游。修炼神功，开宗立派，积攒财富，携手同门在激烈战斗中与宿敌争夺通往昆仑之巅的机会！

8BitMMO is a retro-style 2D massively multiplayer game! It's a giant construction sandbox -- you can build a home or a castle in a persistent streaming world. Found and manage your own city. Fight evil LawyerCats and engage in Player vs Player battle.

AION 2 is the only MMORPG built around a world where the sky is the battlefield. Choose your faction, ascend as a Daeva, and fight a faction war across a world 36 times larger than the original. PC only, on Unreal Engine 5.

Dive into a world of epic adventure! Create your perfect hero thanks to a uniquely customizable class system. Collect, craft, and customize your gear. Go it alone or group up to challenge dungeons, raids, dynamic open-world content, and your fellow players.

Downfall MMORPG is an open-world sci-fi & fantasy MMORPG where magic and technology collide. Choose a faction, forge your own playstyle, and fight for control of a living world in massive PvP battles and endless PvE adventures.

A persistent-world space MMO where you mine, craft, trade, and fight alongside your guild. Build your ship, run dangerous routes, and pick a side in a three-way conflict centuries in the making.

The idle MMO that lives above your Windows taskbar. Chop, smelt, slay and raid with your clan while you work. Every item you loot trades on the Steam Community Market · gear, keys, chests, even the pets. Free to play. No ads, no energy, no subscription.

Discover a universe of adventure in Skyforge, the sci-fi action MMO brought to you by Innova Co SARL. Explore the breathtaking world of Aelion, become an Immortal, switch between 18+ classes, and master amazing powers to defend the planet from invasion. Play for free today!

Command and customize your own capital ships. Take down opponents in thundering, team-based combat. Dreadnought is a free-to-play shooter that puts you at the center of spaceship battles on a colossal scale.

CSC is a casual space MMO with fast-paced combat, a robust player economy, and an uncapped crafting system. CSC is a game in active development.

Star Sonata 2 is a space sandbox MMO that combines elements of action, RPG, and empire creation into a truly unique MMO. Explore the sandbox style universe, build persistent bases, construct trade ships, and even fight your way to the top and claim the Emperor’s Throne!

RPG MO is a nostalgic MMORPG that reminds of Ultima and Runescape Classic.

Ergo Sum is a free-to-play pixel art MMORPG with a charming open world. Play with friends or make new ones, explore a vast array of classes and evolutions, gain admission to an arcane school, and collect rare monster cards. Grow stronger with each passing day.

A hardcore 2D MMO sandbox where survival depends on your skill in trade and combat. A world with a living economy and full loot that functions even when playing solo. Become a trade magnate, pirate, mercenary, or ruins explorer in this post-apocalyptic machine-world simulator.

The Great Battle between Karus and El Morad has arrived to Steam! Pledge allegiance to one of the Nations and put your skills to the test in one of the best PvP system in the MMORPG universe!

Take control of your own starship and blaze your trail in an ever-changing galaxy. Master the arts of combat, mining and trade or venture out into the unknown across a 1:1 scale universe.

Ragnarok: The New World is Gravity's officially licensed cross-platform MMORPG, reimagining RO's cute, classic Midgard with high-quality visuals and audio on PC and mobile. Choose 8 Classes, including the new Druid. Explore, tame MVPs as Mounts, trade freely, and customize 100+ looks with friends!

EverQuest® II is a deep fantasy MMORPG with over two decades of content, a thriving world, and ongoing expansions that keep Norrath growing. Create your hero and adventure through a massively rich, ever-evolving universe.

Astravek is a premium online space MMO. Buy once and command your own ship in a persistent galaxy — mine asteroids, craft gear, trade on a player-driven market, and fight tactical top-down space combat against and alongside other captains.

Void Armada is a sci-fi sandbox MMORPG where exploration, trade, and warfare shape a living galaxy. Explore unknown star systems, gather rare resources, build powerful starships, trade in an open marketplace, and fight in massive fleet battles for wealth and influence.