Games like Abyssus on Steam
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Counter-Strike: Condition Zero
With its extensive Tour of Duty campaign, a near-limitless number of skirmish modes, updates and new content for Counter-Strike's award-winning multiplayer game play, plus over 12 bonus single player missions, Counter-Strike: Condition Zero is a tremendous offering of single and multiplayer content.
EARTH DEFENSE FORCE 4.1 The Shadow of New Despair
It's a fight for the future of the planet between the Ravagers, a merciless swarm of alien invaders, and the Earth Defense Force (EDF) in this third-person shooter.Play as four different classes in over 80 missions with a range of 800 weapons at your disposal.Co-op play supported.
Hellcoming
Hellcoming is a co-op horror survival game for 1-4 players, who need to clean large areas from hellish abomination with the help of special tools.
Dungeon Defenders: Awakened
Dungeon Defenders: Awakened is co-op Tower Defense combined with epic Action RPG combat. You’re able to join forces with up to four players to take on a never-ending army of orcs, demons, and dragons! Are your defenses strong enough to save the world of Etheria?
Time Warpers
Time Warpers is the evolution of the popular incremental game Time Clickers. With features like gun customization, optional permadeath & co-op with friends, it combines a first person shooter with the seemingly endless progression & upgrades of a clicker game.
Shift Happens
Shift Happens is a cooperative platformer for two. You and a friend shift your mass, throw each other and puzzle your way through four stages of stylized imaginary worlds. Including the occasional backstabbing and taunting. Play with a friend on a couch, online or even special singleplayer levels.
WARMODE
Free to play shooter about the confrontation of two irreconcilable sides, represented by the government military housings and the armed hirelings. Try your hand at virtual battles with off-scale dynamics and hurricane gameplay in the spirit of the classical shooters.
Space Beast Terror Fright
S.B.T.F. is a very hard arcade-style / rogue-like / perma-death first person shooter. You play as Marines who must brave dark, claustrophobic and terrifyingly intense Space Beast infested spacecraft in order to extract critical data and lucrative upgrades. Can you make it out alive?
Call of Duty®: Modern Warfare®
Experience a visceral Campaign or assemble your team in the ultimate online playground with multiple Special Ops challenges and a mix of Multiplayer maps and modes.
Emissary Zero
Co-op horror (1-4 players). You are sent to explore a mysterious building at night. Find the Moon and try to return alive.
NETHER DUNGEONS
Nether Dungeons is an action-packed dungeon crawler. Battle through procedurally generated dungeons, face relentless enemies, and defeat epic bosses. Customize your hero, wield diverse weapons, and survive intense challenges as you descend into ever-changing, dangerous depths.
Tiny Tina's Wonderlands
Embark on an epic adventure full of whimsy, wonder, and high-powered weaponry! Roll your own multiclass hero then shoot, loot, slash, and cast on a quest to stop the Dragon Lord.
In Silence
In Silence is a multiplayer horror game. One player takes on the role of the monster who has hypersensitive hearing abilities and is almost completely blind. The other players(2-6) play as survivors, trying to escape or hunting the monster.
One-armed robber
One-armed robber is a chaotic first-person heist game that centers around a uniquely challenging premise. Players take the role of a determined robber equipped with only one arm, tasked with pulling off daring heists on banks, shops, and various establishments.
Angels Fall First
From commanding the battle standing on the bridge of your flagship all the way down to tactical infantry firefights - AFF brings together all the combat you ever wanted in a rich science fiction setting. Boarding, pilotable capital ships, deep weapon customization and full AI support included!
OUTLAWED
OUTLAWED is a crime-themed PvE or PvPvE first-person extraction shooter, set in a modern city overrun by gangs. Enter solo or with a squad to challenge powerful enemies and search for riches, and use everything at your disposal to make it out alive.
The Spell Brigade
Survivors-like with ONLINE CO-OP for 1-4 players. Team up with your wizard friends to slay hordes of dark creatures. Complete team-based objectives, unlock new upgrades and create overpowered spell synergies. Friend nor foe is safe in this friendly fire bullet hell!
Echo Point Nova
Echo Point Nova is an open-world FPS that offers unparalleled freedom and thrilling speed. Designed for both singleplayer and coop. From the creators of Severed Steel.
Blood and Bacon
This Co-op Shooter , has Day and Night levels, multiple maps, players will take on 25 enemy types and numerous bosses, like Gargantuan Monsters and Minibosses every 10 days as you explore, shoot and run for your life against the onslaught of porcine monstrosities.
Killing Floor 2
In KILLING FLOOR 2, players descend into continental Europe after it has been overrun by horrific, murderous clones called Zeds that were created by rogue elements of the Horzine Corporation. 6-player Co-Op & 12-player VS Zed-slaughtering mayhem.
BrainBread 2
Grab a weapon, demolish your enemies, level up, become more powerful, let the gore flow, let the limbs fly. BrainBread 2 introduces a zombie fps mixed with RPG / Arcade elements, the game is very action-packed and generally fast-paced.
Zombie Panic! Source
Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification.
Strange Brigade
Embark on an exotic journey into danger in this rip-roaring 1930s third person adventure for 1-4 players! Encounter pulse-pounding action, treacherous traps and tales of derring-do!