Games like Karos on Steam
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Guild Wars 2
Guild Wars 2 is an award-winning online roleplaying game with fast-paced action combat, deep character customization, and no subscription fee required. Choose from an arsenal of professions and weapons, explore a vast open world, compete in PVP modes and more. Join over 16 million players now!
Phantasy Star Online 2 New Genesis
Phantasy Star Online 2 New Genesis is a free-to-play action MMO. Join players around the world to explore the planet Halpha and fight in epic battles as ARKS Defenders! Unleash your imagination with our ultimate character creation experience and creative spaces to create your own phantasy.
EVE Online
EVE Online is a free-to-play community driven space MMO where players can choose their own path from countless different options. Experience space exploration, immense PvP and PvE battles, mining, industry and a thriving player economy in an ever-expanding sandbox.
Tower of Fantasy
Embark together on your fantasy adventure! Set hundreds of years in the future on the distant planet of Aida, the shared open-world RPG, anime-infused sci-fi adventure Tower of Fantasy now is officially available on Steam.
Project: Gorgon
Project: Gorgon is a fantasy MMORPG that allows you to forge your own path through exploration and discovery.
Nin Online
Fight and train to become the strongest Ninja in a large Open World MMORPG. Nin Online combines deep roleplaying systems with intense real-time combat. Warning: This is a very hardcore RPG!
Pantheon: Rise of the Fallen
Pantheon: Rise of the Fallen is a deeply social high fantasy MMORPG that challenges its players and rewards effort. Join the denizens of Terminus to uncover the mysteries of a world divided by Celestial loyalty… and betrayal.
Reign of Guilds
Reign of Guilds is an indie old-school MMORPG where everyone influences other players and the game world. The game doesn't hold your hand, nor does it impose casual restrictions on players' actions. Here, everyone can find their path to power.
Puzzle Pirates: Dark Seas
Every activity in Puzzle Pirates is a uniquely fun puzzle: be it sailing, gunning, or hauling treasure, your own puzzling skill determines your success!
Last Oasis
Nomadic Survival MMO. Build wooden walking machines to travel to new lands. Create clans and fight for territory. Resources deplete fast, so take your sword and scavenge, pirate, and trade to stay alive.
Citadel: Forged with Fire
This massive online sandbox RPG features elements of magic, spellcasting, building, exploring and crafting. As a newly minted apprentice of the magic arts, you will set off to the dangerous world of Ignus. Tame mighty beasts, forge alliances, explore uncharted territories or fight for dominance!
Cyber Hunter
Cyber Hunter is an open-world battle royale game featuring an unique combination of gaming elements, including survival, shooting and exploring. Any vertical surface in the Cyber Hunter world is climbable and players can glide down from high up.
Just Cause™ 3: Multiplayer Mod
Just Cause 3 Multiplayer mod is a free fan-created project bringing an explosive and highly-customizable multiplayer.
Strife®
Strife® is a truly free to play, competitive, MOBA that features non-stop action and engaging combat. Take control of powerful and versatile heroes, each capable of dominating in unique ways, and exert your will in an epic battle between two teams.
Onset
Onset is an open world Lua scripting sandbox without predefined goals. Choose from hundreds of Lua functions from our Developer Wiki to create your own scripts and gamemodes. Onset is a perfect starting point for beginners interested in learning how to program.
Will To Live Online
Will To Live is a MMORPG-shooter whose action takes place in a severe post-apocalyptic world. Explore the world, engage in fights with mutants and other survivors, join the clans in the struggle for existence and prove your right to Live.
PlanetSide 2
PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.
FOS
In this game, you can do whatever you want, not necessarily follow the story of the game, you're not some dirty farmer, right? And for whom did this pathetic, boring, and generally unbearable story come up, because you don't always have to follow it right?
Dead Maze
Dead Maze is a 2D MMO game set in a destroyed contemporary world, filled with zombies. Explore the world, scavenge and craft as many items as possible, to survive the hostile environment and upgrade your gear and camp as you go.
Royal Quest Online
Fantasy comes alive in this vast yet cozy free-to-play MMORPG! Choose between 4 classes and 8 subclasses, explore hundreds of locations, thousands of quests, dive into varied PvE and PvP modes, enter the unique vibrant world, and trade with other players. Play, explore, fight and be victorious!
APB Reloaded
The world’s first and premier Action MMO Third Person Shooter allows you to choose between two sides of the law. Play as Enforcer or Criminal, customize your gear for the task at hand and hit the streets and play how you want in a city filled with more action this side of a Hollywood blockbuster.