Games like Deuterium Wars on Steam
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Sword Art Online: Integral Factor
Aim to conquer Aincrad with Kirito and Asuna
Dungeons & Dragons Online®
Enter a world of danger and adventure with Dungeons & Dragons Online® based on the beloved RPG that started it all.
Alien Swarm
Co-operative multiplayer game and complete code base available for free.
AXIOM SOCCER
Axiom Soccer is a high speed evolution of vehicular soccer combining fast-paced driving with tactical shooting mechanics for a new soccer experience. Inspired by real world ball games, go it alone or team up with friends and blast through divisions to pursue Axiom Soccer championship glory.
Frenzy Retribution
This hardcore hard style with high penalty and high reward requires players to deeply understand the complete motion system and various values, weapon activity, counterattack, enemy fury and execution, etc., with the uninterrupted fast-paced attack and defense of the enemy and the enemy, let the player experience Stimulating battle.
Long Live Santa!
Santa is dead. Now the remaining bearded men of the Norwegian wilderness must fight to the death. Will you be the next Santa, or die in the snow? Punch, slice, outwit your way to a fulfilling new seasonal job in this online PvP third-person fighter!
Just Cause 2: Multiplayer Mod
JC2-MP is a project to bring multiplayer to Just Cause 2 in all of its magnificent glory. Imagine the chaos of normal Just Cause 2, then extending it out to dozens, hundreds, and even thousands of players.
Rogue Company
Join 20+ million players in Rogue Company, the ultimate third-person tactical action shooter! Become an agent of Rogue Company and wield powerful weapons, high-tech gadgets, and game-changing abilities. Accept the mission and jump into a variety of 4v4 and 6v6 game modes. Play FREE today!
Gangs of Space
Gangs of Space is a massively-multiplayer Rogue Shmup where Gangs of players compete for the conquest of the galaxy.
ATOMEGA
Grow, fight, collect and evade in the last cosmic arena the very end of time. Acquire MASS to evolve your EXOFORM from the nimble ATOM to the godlike OMEGA and compete for fun and dominance in a fast-paced, multiplayer shooter. ATOMEGA™ !
Onigiri
Onigiri is an MMO Action RPG with a fast weapon changing battle system. Join a party of other players or travel with 8 NPC companions on your journey. With simple controls, you can dive into the thrilling world of Onigiri. Switch between weapons to battle through the Youkai.
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.
DC Universe™ Online
DC Universe Online is a Free-to-Play, massive multiplayer online action game set in the popular DC Universe. Become one of a new breed of Heroes or Villains and wield incredible powers as you go to war with legendary characters such as Batman, Superman, Lex Luthor and The Joker.
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.
UNDEFEATED
Become an invincible hero with unlimited super powers on UNDEFEATED!
Block N Load
Five of you. Five of them. Face off in a battle where everything you build, destroy, construct or shoot has a devastating impact on the entire game. Build defences using a crazy range of block types and work together in this FPS where no game is EVER the same. NOW FREE TO PLAY.
Mitos.is: The Game
Step into the microscopic world of Mitos.is! Eat or be eaten—become the ultimate cell in a highly addictive multiplayer game. Diverse modes, daily tournaments, guilds, and gear await! The BEST game of 2015 is back!
Atma
Atma is a pixel art adventure game : Embody Shaya, Guardian of the living and the spirit world. Atma, your lover, calls you from the afterlife: he needs help. What if you could bring him back to you? However, this would mean disrupting the balance between the two worlds... What choice will you make?
Overclocked
Overclocked is a free-flowing action game that blends combat and platforming to create a fluid and rhythmic experience. Take on the role of Amber, a glass-cannon vigilante, as you fight to uncover a plot that threatens to tear your home apart.