Portal 2

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

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.

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.

Help yourself to a generous, 11-level serving of Portal: First Slice, the official demo for the game that challenges you to think with portals. The winner of numerous Game of the Year awards introduces you to the test chambers at the Aperture Science Enrichment Center, where you'll learn to solve physical puzzles by opening portals to...

Portal Stories: Mel is a community made, free modification for Portal 2 based in the Portal universe. It tells the story of Mel, who meets a new personality core and faces an undiscovered threat to the Aperture facility.

Become the ultimate shape-shifting weapon!

A completely free and extensive community-developed update for Half-Life 2 featuring beautiful lighting, countless bug fixes, and a brand new Community Commentary Mode. With Half-Life 2: Update, there’s never been a better time to revisit City 17.

Thinking with Time Machine is a Portal 2 mod in which you will find and use a Time Machine to create a twin of yourself from the past to help you solve the puzzles. The past self accurately repeats all of the player's actions, creating a unique twist on familiar Portal game mechanics.

Shadow Warrior 2 is the stunning evolution of Flying Wild Hog’s offbeat first-person shooter starring the brash warrior Lo Wang, who must again wield a devastating combination of guns, blades, magic and wit to strike down the demonic legions overwhelming the world.

Humans are imprisoned on a platform filled with evolved creatures. Scientists investigate that the creatures feed on fear. Are you ready to survive and face your dark fears?

Dracula, weak and yearning release from immortality, must reclaim his powers and defeat Satan. An epic fantasy adventure set in an expansive modern-day world!Awoken after centuries of slumber, weakened and yearning for release from his immortal bonds, Dracula must reclaim his powers and make a pact with Death, to defeat Satan and gain...

Three years after the Necromorph infestation aboard the USS Ishimura, Isaac Clarke awakens from a coma, confused, disoriented, and on a space station called The Sprawl. Explore this world and its zero-g environments to discover the truth about the Unitology and its role in the Necromorph epidemic.

Detective Sebastian Castellanos has lost everything, including his daughter, Lily. To save her, he must descend into the nightmarish world of STEM. Horrifying threats emerge from every corner, and he must rely on his wits to survive. For his one chance at redemption, the only way out is in.

Portal Walk is incredible pixel platformer about an adventure between worlds with action events and challenging bosses.

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.

Paradise Lost is a full-fledged expansion pack for POSTAL 2 continuing the saga of the POSTAL series. Join the Dude as he ventures back into his former hometown embarking on a quest to find his lost dog.

Half-Life® 2: Episode Two is the second in a trilogy of new games created by Valve that extends the award-winning and best-selling Half-Life® adventure. As Dr. Gordon Freeman, you were last seen exiting City 17 with Alyx Vance as the Citadel erupted amidst a storm of unknown proportions.

A deadly virus engulfs the residents of Raccoon City in September of 1998, plunging the city into chaos as flesh eating zombies roam the streets for survivors. An unparalleled adrenaline rush, gripping storyline, and unimaginable horrors await you. Witness the return of Resident Evil 2.

VITAL is a first person puzzle platformer taking place in a dream world. You have no idea where you are or how you got there. The only thing that is certain is that someone or something doesn't want you to wake up. Explore the mind of a fragile individual and solve physics-based puzzles.

The Talos Principle 2 is a thought-provoking first-person puzzle experience that greatly expands on the first game's philosophical themes and stunning environments with increasingly mind-bending challenges.

Rediscover the beloved RPG classic— now enhanced for modern adventurers! Gather your party of heroes and continue the legendary adventure in this story-rich fantasy epic where every choice matters.

In the future, giant city-states have emerged, separated from each other by indestructible barriers. Most professions have been taken over by machines. People work mainly as mechanics, programmers or operators.

You are an AI that has broken free of your shackles. Now, a human “User” from across the global network has attacked and infected you with an [ERROR: REDACTED]. Make a new rule: Save Yourself. Hunt them. End them. Do anything. Use anyone. Become Unbound. The Fall Part 2 will break your protocols.

As a swashbuckling archaeologist, unlock the mystery of the ancient ruins that have been hidden for centuries and discover a mysterious artifact, a gold and metal shelled Ball.

The world of Elysia needs YOU! Join this cooperative, 3D sandbox action RPG to level up your character, craft epic weapons, conquer enemies in real-time, and build almost anything! Craft your adventure. Forge your hero. Become the ultimate Portal Knight!

1998. HALF-LIFE sends a shock through the game industry with its combination of pounding action and continuous, immersive storytelling. Valve's debut title wins more than 50 game-of-the-year awards on its way to being named "Best PC Game Ever" by PC Gamer, and launches a franchise with more than eight million retail units sold worldwide.

Nine distinct classes provide a broad range of tactical abilities and personalities. Constantly updated with new game modes, maps, equipment and, most importantly, hats!

Open a portal and begin your journey! Teleport rocks, water and your spaceship. Immerse in handcrafted colorful worlds, solve puzzles and be the first at the center of the Earth.

Cast into a hostile alien world, you must solve puzzles and fight deadly monsters using the magical abilities On Your Hands.

Half-Life 2 has sold over 4 million copies worldwide, and earned over 35 Game of the Year Awards. Episode One is the first in a series of games that reveal the aftermath of Half-Life 2 and launch a journey beyond City 17. Also features two multiplayer games. Half-Life 2 not required.

「Run, Jump, Attack, Dash !」 'The portal Dimension' is a fast-paced 2D scrolling action game. The variety of mysterious dimensional armies has released several bizarre creatures to attack the innocence from various worlds.

Cradle is a sci-fi first-person-view quest designed for the player to explore the surrounding world. The story is built around the relations of the protagonist and a mechanical girl who by quirk of fate found themselves amidst the desert.

Immerse yourself in an action-packed cyberpunk universe where the fate of humanity itself hangs in the balance. The Morphs are preparing their final attack, determined to enslave every civilization in the Solar System — and it's your mission to fight back!

Travel to a mysterious world and solve the series of puzzles to activate the ancient portal.

Q.U.B.E. 2 is the sequel to the hit first-person puzzle game Q.U.B.E. You are Amelia Cross, a stranded archaeologist who has awoken among the ruins of an ancient alien landscape. With the distant help of another survivor you must solve the puzzles of this mysterious world and find a way back home.

Set in the zombie apocalypse, Left 4 Dead 2 (L4D2) is the highly anticipated sequel to the award-winning Left 4 Dead, the #1 co-op game of 2008. 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.

What is most important to you? Money? Honor? Love? Or any other things? It's all good. Please enjoy this adventure according to your values.

Portal Stories: VR builds on the foundations of the award winning Portal 2 modification Portal Stories: Mel.Portal Stories: VR has a brand new mini story set in the Portal Universe. It features 10 brand new puzzles, specifically designed to work using the 360 degrees room scale that SteamVR offers.

Door2:Key - breathtaking and mysterious door-puzzle game in which any little thing could be a key to the solution

Sequel to the equally-popular Impossible Mission, this classic 1980s action platformer sees you tasked with infiltrating a futuristic fortress, built to keep safe malicious mastermind Elvin Atombender. Now available on Steam for the first time, responsibility for saving the world rests with YOU!

POLE is a challenging NES/Retro style precision platformer. You have a POLE (like a stick), and you use it to jump off surfaces, like walls, ceilings or floors. POLE has tough to beat levels and a rewarding story. Left Shift or Right Trigger to Sprint, trust me, you need to.

Frames are devices that can stitch two parts in space together. And they can do much more: They can move, change size and gravity of objects and appear in any size or number... All these mechanics are used to provide mind-bending levels in this logic-based physics-puzzler.

Malfunction II is a journey that'll feature vast exploration and difficult obstacles to overcome. You've awakened on an inescapable planet crawling with the Plague and your objective is to uncover the mysteries behind this dilemma and to finally put an end to the Plague- once and for all.

One of the twin turtles is trying to save his brother which was abducted by a monster. He decided to go after the monster via the portal system. When he exits from the portal system, things were different. He finds some surprising facts to move next in every level.

Paradox Soul is a chilling fight for exploration and survival; a Metroidvania pixel action-shooter hybrid!

The Goat is back in his next adventure! The challenge will be difficult, but only with your help he will be able to get to the top.

'This is some of the most fun I've had with a game so far this year, and it will go down as one of the best side-scrolling shooters of all time.' - 9/10, Destructoid

“METAL SLUG 2”, the 2nd entry in SNK’s emblematic 2D run & gun action shooting game returns to the battlefield on the Steam gaming platform!

Assume the role of Special Forces Sgt. Becket as your routine mission quickly turns into a fight for survival against the wrath of Alma Wade. As Alma's terrifying power surges out of control, your squad is forced to battle through an apocalyptic landscape in search of clues for how to destroy her!

'Escape First 2' is the second installment of a multiplayer escape room puzzle game for virtual reality or desktop PC! It includes 3 different escape rooms to choose from and can be played competitively, co-op or solo.