Shooter

86 Free to play Multiplayer Online Shooter Games found! Suggestions:

StarBreak

Set in the distant future, when humanity is on the brink of extinction, StarBreak is a free-to-play platformer MMO with loads of exploration and fast-paced combat.

Energy Heroes

From indie French developer Studio22 comes Energy Heroes, a futuristic, third-person, free-to-play MOBA where shooting skills and tactical thinking go hand-in-hand.

The Skies

The Skies is a post-apocalyptic open-world free-to-play MMORPG that offers amazing freedom and a huge world to explore and exploit.

Time of Dragons

Take to the skies in Time of Dragons, a free-to-play massively multiplayer online shooter where you ride a dragon armed to the teeth with missiles and lasers.
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Paladins

Paladins: Champions of the Realm is Hi-Rez Studios' take on the arena-battling genre, taking cues from multiple games and applying a unique sheen of medieval mayhem!

Robocraft

Robocraft is a team oriented shooter, in which players build and then battle with their very own robotic creations. Robocraft features an incredibly flexible vehicle editor, which lets players place individual blocks in hundreds of configurations, giving them the ability to create truly unique robot designs.

Armored Warfare

Armored Warfare is a 3D free-to-play multiplayer tank combat simulator. Players have a wide variety of tanks, maps, and game modes to challenge their skills against others.

Double Action: Boogaloo

PLAY NOW About the game: Title: Double Action: Boogaloo Status: Released Graphics: 3D Genre: FPS Developer: Double Action Factory Publisher: Double Action Factory Double Action: Boogaloo is a free-to-play multiplayer shooter...

Counter-Strike Nexon: Zombies

Counter-Strike Nexon: Zombies is a free-to-play MMOFPS collaboration between Nexon and Steam. It brings classic game modes and maps along with new zombie-themed PVP and PVE content along with crafting and a family system to obtain special gear with friends.
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Trove

Trove is a Voxel-based MMO that regularly generates exciting new worlds. It features free-form exploration , and enables community contributions to significantly impact the game through player created creatures and environments.

Altitude

Altitude is a free-to-play 2D aerial combat fighting game. Combining Call of Duty-like perks and Team Fortress 2 variety in a nonstop action package, you choose your plane based on personal play-style and team composition and jump into the fray.

America’s Army: Proving Grounds

America's Army is one of the most popular free PC online action games. Created with fun in mind but also as a recruitment tool to the army...
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Planet Arkadia

Players fight to survive and overcome against immense odds while hunting for treasure and gathering resources. Planet Arkadia gives players the ability to use any skill they choose, from combat to plastic surgery, with no classes to limit them.
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Unturned

Unturned is a first person survival FPS in which players must scavenge for supplies as they traverse a zombie-filled environment. In order to survive players need a source of food and water to stave off dehydration, famine and sickness which will ultimately lead to their characters permanent death.
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Fistful of Frags

Fistful of Frags is the full release re-imagining of the popular Western FPS mod for Half Life 2 originally developed in 2007. FoF features skill based gunplay inspired by popular spaghetti western fills like the 1964 film "Fistful of Dollars" which inspired the name. Players assume the identities of outlaws, lawmen and banditos and may fight in team based or Free-for-All game modes.
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Survarium

Survarium is a post-apocalyptic shooter set in eastern Europe after an ecological catastrophe. In the aftermath of the calamity, groups of survivors have banded together to form groups known as Scavengers, The Fringe Settlers, The Black Market and The Renaissance Army. Each side can offer special missions to players which grant them further reputation with that faction.
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Dungeon Defenders 2

Dungeon Defenders 2 sees the return of the popular tower defense mode featuring unique heroes, with more hero customization, persistent hero leveling, loot and a town square where players can socialize, manage their heroes, shop, trade, and queue for matches.