Built on a modified version of Valve's Source engine, Garry's Mod (or GMod for short) is a physics sandbox game.
One of the great strengths of Garry's Mod is that it is incredibly modder friendly. This has lead to a thriving community that is always coming up with new addons and gamemode for everyone to enjoy.
One of the most popular online action games of all time, Team Fortress 2 delivers constant free updates—new game modes, maps, equipment and, most importantly, hats. Nine distinct classes provide a broad range of tactical abilities and personalities, and lend themselves to a variety of player skills.
Counter-Strike: Source is a remake of Counter-Strike using the Source game engine. As in the original, Counter-Strike: Source pits a team of counter-terrorists against a team of terrorists in a series of rounds. Each round is won either by completing an objective (such as detonating a bomb or rescuing hostages) or by eliminating all members of the enemy team.
Counter-Strike: Global Offensive (CS: GO) expands upon the team-based action gameplay that was pioneered when Counter-Strike was launched.
CS: GO features new maps, characters, and weapons and delivers updated versions of the classic CS content (de_dust, etc.). In addition, CS: GO will introduce new gameplay modes, matchmaking, leader boards, and more.
Set in the zombie apocalypse, this co-operative action horror FPS takes you and your friends through the cities, swamps, and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.
You'll play as one of four new survivors armed with a wide and devastating array of classic and upgraded weapons. In addition to firearms, you'll also get a chance to take out some aggression on infected with a variety of carnage-creating melee weapons.
Helping to take L4D's frantic, action-packed gameplay to the next level is AI Director 2.0. L4D2 promises a satisfying and uniquely challenging experience every time the game is played, custom-fitted to your style of play.
The very world is at your fingertips as you fight for survival, fortune, and glory. Delve deep into cavernous expanses, seek out ever-greater foes to test your mettle in combat, or construct your own city - In the World of Terraria, the choice is yours!
Blending elements of classic action games with the freedom of sandbox-style creativity, Terraria is a unique gaming experience where both the journey and the destination are as unique as the players themselves!
Everything wants you to die. You need to find food, shelter and weapons to prevent it.
If they're not your friends, they're your enemy. RUST is a tough game. It's not shameful to ask for some help. But be careful who you trust.
The best defense is a strong offense. They can't attack you if they're dead and you've got all their stuff.
You’ve fled your home, only to find yourself lost in space with a damaged ship. Your only option is to beam down to the planet below and gather the resources you need to repair your ship and set off to explore the vast, infinite universe…
In Starbound, you create your own story - there’s no wrong way to play! You may choose to save the universe from the forces that destroyed your home, uncovering greater galactic mysteries in the process, or you may wish to forego a heroic journey entirely in favor of colonizing uncharted planets.
StarMade allows players to explore the vastness of space; building factories; creating ships, space stations and structures out of various block types. Both single-player worlds and multi-player servers are available to players. StarMade is currently in Alpha, and is a free-to-play game (hosting a server is not free).
Left 4 Dead is a singleplayer and multiplayer cooperative survival horror FPS game that puts four human playable or AI-controlled survivors of an apocalyptic pandemic against hordes of the infected. The goal of Left 4 Dead for the survivors is to help each other make it through a level to safety. Basic gameplay never changes from map to map, but the director keeps things from getting monotonous by throwing in different challenges at every level making no two playthroughs exactly alike.
Killing Floor is a Co-op Survival Horror FPS set in the devastated cities and countryside of England after a series of cloning experiments for the military goes horribly wrong. You and your friends are members of the military dropped into these locations with a simple mission: Survive long enough to cleanse the area of the failed experiments!
Descend into continental Europe where the outbreak caused by Horzine Biotech’s failed experiment has quickly spread and gained unstoppable momentum, essentially paralyzing the European Union— Just one month after the events in the original KILLING FLOOR, the specimen clones are everywhere and civilization is in disarray; communications have failed, governments have collapsed, and military forces have been systematically eradicated. The people of Europe know survival and self-preservation too well and lucky survivors have gone into hiding.
Not all have given up hope though... A group of civilians and mercenaries have banded together to combat the outbreak and established privately funded operation bases across Europe. Upon tracking specimen clone outbreaks, players will descend into zed-laden hot zones and exterminate them.
Take to the streets for intense close quarters combat, where a team's survival depends upon securing crucial strongholds and destroying enemy supply in this multiplayer and cooperative Source Engine based experience.
Eco is an online game where players must collaborate to build a civilization in a world where everything they do affects the environment. All resources come from a simulated ecosystem, with thousands of plants and animals simulating 24/7. Work together through the player-run government and economy to build the technology to stop a meteor on a collision course with the planet, without polluting the world and killing it off in the process before that even happens.
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.
Insurgency: Sandstorm is a team-based, tactical FPS based on lethal close quarters combat and objective-oriented multiplayer gameplay. Sequel to the indie breakout FPS Insurgency, Sandstorm is reborn, improved, expanded, and bigger in every way. Experience the intensity of modern combat where skill is rewarded, and teamwork wins the fight. Prepare for a hardcore depiction of combat with deadly ballistics, light attack vehicles, destructive artillery, and HDR audio putting the fear back into the genre.
Don't Starve Together is the standalone multiplayer expansion of the uncompromising survival game Don't Starve. Play with your friends in an unforgiving wilderness survival game full of science and magic. Enter a strange and unexplored world full of strange creatures, dangers, and surprises. Gather resources to craft items and structures that match your survival style.