173 Moddable · Singleplayer games your group can play together online, including Quake II, Quake III Arena, and Garry's Mod.
All games: 24
You are humanity’s last hope to stop the Strogg, a hostile alien race waging war against Earth. Play this military sci-fi FPS, now upgraded for modern platforms with improved visuals, new campaign content, online multiplayer/co-op, and more.
The greatest warriors of all time and space have been summoned to battle for the amusement of an ancient alien race. Wield a variety of guns and power-ups as you fight for glory against ruthless combatants in this fast-paced single-player and multiplayer FPS.
Garry's Mod has no built-in co-op campaign, but its online Sandbox gives you and your friends physics tools, props, and a huge community workshop to turn an empty map into your own project.
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
Progress with every slain monster, learn over 80 skills through talents, craft hundreds of items, and explore vast procedurally-generated worlds in this ever-expanding sandbox RPG!
Building on over 15 years of gameplay design, Red Eclipse continues to focus on fast paced, agile, easily accessible first person shooter gameplay. For creators, the full power of the Tesseract engine is at your fingertips in the included realtime multiplayer editor.
A rhythm game where you swipe between two lanes to the beat. Form your own flow and unleash your greatest swiping performance.
It’s time to discover your inner artist! With Vermillion, you get a fully equipped oil painting studio in your home, without any of the mess. Ready for the unrivaled sense of accomplishment from creating your first painting?
Explore the vast reaches of VoidExpanse -- mine asteroids, upgrade your ship, trade, complete missions, advance your character and survive fast-paced combat with hostile aliens and mercenaries in the rich and exciting Sci-Fi universe of VoidExpanse!
Conquest of Elysium 4 is a quick turn based fantasy strategy game with a touch of rogue-like. The game is full of depth, details and monsters. There are also a huge number of factions, each with its own unique gameplay and magic rituals.
Racquetball meets Breakout inside a giant pinball machine! Racket: Nx is a new kind of game that challenges the limits of what you can do with a racket and ball in VR.
If you like warships but wish they could kickflip, Waves of Steel is for you! Build your own custom warship and embark on a sprawling campaign filled with enemy ships, planes, submarines, and bizarre superweapons. Fast-paced arcade naval action is here!
Feel speedway emotions thanks to realistic riding physics. Play online mode with friends or local in career mode, league mode, challenges, tournament and quick matches. Are you ready for the challenge?
Invent a new computer! Logic World is a first-person sandbox simulation game that's all about digital logic. Play alone or with friends, design unique machines, build up layers of complexity, and experience the joy of circuits!
ARE YOU READY FOR CLASSIC REALTIME TACTICS? Be the nameless heroine in the wastelands of DUSTWIND's story campaign or find with two friends a new home or fight against and with human players in the elaborate Multiplayer mode or design your very own story campaigns and maps in the mighty map editor!
A kart racing game without weapons! This is a pure motorsport arcade racer. Compete vs very challenging AI, get on the global leaderboards and play with others online.
Drive vintage diesel trains, shifting gears manually and trying to reach a perfect score. Create new routes, trains and timetables. Share your creations and download new content from the Workshop.
Fragsurf is a dynamic blend of multiplayer first-person shooter PvP, strafing, surfing, and bunnyhop, allowing players to engage in high-speed maneuvers and combat.
Who's Who 2.0 is back with brand new team! Looking for another dynamic party game? Each characters now holds unique skills which now will impact each modes with its own advantages! You can play solo, or party up with your friends and become the winner by eliminating the real players among the NPCs.
Axis Football is a simulation-style football game featuring the industry's best franchise mode, massive customization, and realistic gameplay.
Modbox is a multiplayer game creation sandbox for Desktop+VR
In Crash Time - Undercover you will experience non-stop racing action, and embark on a high-octane manhunt, with thrilling car chases and lots of explosive missions! Are you ready? Highways are waiting for you!
Axis Football features football gaming's deepest Franchise Mode and massively improved simulation-style gameplay.