Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

Use stunning live wallpapers on your desktop. Animate your own images to create new wallpapers or import videos/websites and share them on the Steam Workshop!

Stranded on the shores of a mysterious island, you must learn to survive. Use your cunning to kill or tame the primeval creatures roaming the land, and encounter other players to survive, dominate... and escape!

Travel across Europe as king of the road, a trucker who delivers important cargo across impressive distances! With dozens of cities to explore, your endurance, skill and speed will all be pushed to their limits.

The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

First-person action survival game set in a post-apocalyptic open world overrun by flesh-hungry zombies. Roam a city devastated by a mysterious virus epidemic. Scavenge for supplies, craft weapons, and face hordes of the infected.

Experience true combat gameplay in a massive military sandbox. Deploying a wide variety of single- and multiplayer content, over 20 vehicles and 40 weapons, and limitless opportunities for content creation, this is the PC’s premier military game. Authentic, diverse, open - Arma 3 sends you to war.

Jump and fly your way through danger in this rhythm-based action platformer!

7 Days to Die is an open-world game that is a unique combination of first person shooter, survival horror, tower defense, and role-playing games. Play the definitive zombie survival sandbox RPG that came first. Navezgane awaits!

Cities: Skylines is a modern take on the classic city simulation. The game introduces new game play elements to realize the thrill and hardships of creating and maintaining a real city whilst expanding on some well-established tropes of the city building experience.

The critically acclaimed RPG that raised the bar, from the creators of Baldur's Gate 3. Gather your party. Master deep, tactical combat. Venture as a party of up to four - but know that only one of you will have the chance to become a God.

Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you.

Welcome to Hope County, Montana, home to a fanatical doomsday cult known as Eden’s Gate. Stand up to cult leader Joseph Seed & his siblings, the Heralds, to spark the fires of resistance & liberate the besieged community.

A dynamic soft-body physics vehicle simulator capable of doing just about anything.

Age of Empires II: Definitive Edition features “The Last Khans” with 3 new campaigns and 4 new Civilizations. Frequent updates include events, additional content, new game modes, and enhanced features with the recent addition of Co-Op mode!

Portal™ is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the horizon and will offer gamers hours of unique gameplay.

Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive.

Experience legendary American trucks and deliver various cargoes across sunny California, sandy Nevada, and the Grand Canyon State of Arizona. American Truck Simulator takes you on a journey through the breathtaking landscapes and widely recognized landmarks around the States.

6-player co-op Zed-slaughtering mayhem. And now, 12-player Versus Survival mode, too - now you can BE the Zeds!

Relive Half-Life.

Half-Life: Alyx is Valve’s VR return to the Half-Life series. It’s the story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Playing as Alyx Vance, you are humanity’s only chance for survival.

Only the world’s most ruthless Warden can contain the world’s most ruthless inmates. Design and develop your personalized penitentiary in Prison Architect.

Assetto Corsa v1.16 introduces the new "Laguna Seca" laser-scanned track, 7 new cars among which the eagerly awaited Alfa Romeo Giulia Quadrifoglio! Check the changelog for further info!

Goat Simulator is the latest in high-tech Goat Simulation technology.

Fight upon the Ravenfield together with your Blue allies! Take down those pesky Reds using helicopters, tanks, guns, and active ragdoll physics!

Build and expand your repair service empire in this incredibly detailed and highly realistic simulation game, where attention to car detail is astonishing. Find classic, unique cars in the new Barn Find module and Junkyard module. You can even add your self-made car in the Car Editor.

Plague Inc: Evolved is a unique mix of high strategy and terrifyingly realistic simulation. Your pathogen has just infected 'Patient Zero' - now you must bring about the end of human history by evolving a deadly, global Plague whilst adapting against everything humanity can do to defend itself.

6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!

Set sail for the ultimate pirate experience! Embark on a grand adventure alongside thousands of other players in one of the largest game worlds ever built (and even claim a piece of it to call your own). Build your ship, assemble your crew, sail the high seas, and become a pirate legend!

They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?

A Hat in Time is a cute-as-heck 3D platformer featuring a little girl who stitches hats for wicked powers! Freely explore giant worlds and recover Time Pieces to travel to new heights!

Take the role of a plane crash survivor stranded somewhere in the Pacific Ocean. Come face to face with some of the most life threatening scenarios that will result in a different experience each time you play. Scavenge. Discover. Survive.

Why have friends if not to play Golf... With Your Friends! Nothing is out of bounds as you take on courses filled with fast paced, exciting, simultaneous mini golf for up to 12 players!

A Dance of Fire and Ice is a strict rhythm game. Keep your focus as you guide two orbiting planets along a winding path without breaking their perfect equilibrium.

Tabletop Simulator is the only simulator where you can let your aggression out by flipping the table! There are no rules to follow: just you, a physics sandbox, and your friends. Make your own online board games or play the thousands of community created mods. Unlimited gaming possibilities!

Prepare the perfect heist in this simulated and fully destructible voxel world. Tear down walls with vehicles or explosives to create shortcuts. Stack objects to reach higher. Use the environment to your advantage in the most creative way you can think of.

Contains full Rising Storm content as well!

Draw & Guess is a casual drawing game for 2-16 people with multiple game modes! Choose either the Chinese Whispers mode (4-16 players) or go competitive and draw while everyone else guesses as fast as they can!

Command & Conquer and Red Alert are both remastered in 4K by the former Westwood Studios team members. Includes all 3 expansions, rebuilt multiplayer, a modernized UI, Map Editor, bonus footage gallery, and over 7 hours of remastered music.

Work together to survive the devastating Dinosaur horde in huge, endless environments.

Cut-throat multiplayer running game that pits 4 players against each other, locally and/or online. Run, jump, swing around, and use devious weapons and pick-ups to knock opponents off-screen! One of the most competitive games you'll ever play.

For its 10 year anniversary, Titan Quest will shine in new splendour. This Anniversary Edition combines both Titan Quest and Titan Quest Immortal Throne in one game, and has been given a massive overhaul for the ultimate ARPG experience.

Kingdoms and Castles is a city-building simulation game about growing a kingdom from a tiny hamlet to a sprawling city and imposing castle.

Crypt of the NecroDancer is an award winning hardcore roguelike rhythm game. Move to the music and deliver beatdowns to the beat! Groove to the epic Danny Baranowsky soundtrack, or select songs from your own MP3 collection!

Serious Sam 3: BFE is a prequel to the original indie fast action FPS and Game of the Year sensation - Serious Sam: The First Encounter!

Experience close-quarters battles in iconic WWII settings. Defend the line, storm the beach, torch the enemy, or use a radio to call in fire support. Day of Infamy is a teamwork-oriented shooter that will keep you on your toes and coming back for more with its diverse game modes and authentic arsenal.

Three years after the conflict in Chernarus, portrayed in the original Arma 2, a new flashpoint explodes in the Green Sea Region. Coalition forces led by the US Army are deployed to Takistan to quickly restore peace and prevent further civilian casualties.

Amnesia: The Dark Descent, a first person survival horror. A game about immersion, discovery and living through a nightmare. An experience that will chill you to the core.

Barotrauma is a 2D co-op submarine simulator – in space, with survival horror elements. Steer your submarine, give orders, fight monsters, fix leaks, operate machinery, man the guns and craft items, and stay alert: danger in Barotrauma doesn’t announce itself!

Fight on multiple fronts in Holdfast: Nations At War - A competitive multiplayer first and third person shooter set during the great Napoleonic Era. Charge into battle with over 150 players per server!