Co-op & Multiplayer Games

Serious Sam Fusion is a central hub for several existing Serious Sam games developed by Croteam. Cool new features, engine upgrades, patches and updates will be released to existing owners for FREE!

Caveblazers is a challenging and brutal roguelike platformer. Journey into a mysterious cave, fighting orcs and goblins with an abundance of weapons and magical items! Make friends along the way, then watch in despair as they are crushed in to a bloody pulp under a troll's fist.

Serious Sam is a high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Year 2001!

20XX is a roguelike action platformer that you can play with a friend. Jump and shoot your way through ever-changing levels, collect awesome new powers, and battle mighty bosses in the name of saving the human race maybe!

GARBANZO QUEST! The crazy bullet-heck platformer where your main weapon is your own spit! Bring a friend! Hand-crafted challenges, secrets, and branching paths galore!

Fight fires for fun and profit in this unpredictable and frantic multiplayer game. Team up with friends, take on daily challenges and climb to the top of the corporate firefighting ladder. More than one way to become a hero!

The truly ultimate "WARRIORS OROCHI 3" is now available on Steam! With all the content of "WARRIORS OROCHI 3", new characters and episodes that deepen the story, new modes, and DLC that has been released for other platforms, enjoy the world of Orochi to your heart's content!

The Absolute Evil and its trusted *cough* servant, the Dark Elf Thalya, return in Dungeons 4 after the events of its fabulous predecessor to bring about their triumph over the forces of good once more.

When you cut ties to the past, new bonds form. Build relationships with other Yarnys in local co-op or as a single player, fostering friendship and support as you journey together.

LORT is a 1–8 player co-op action roguelite. Team up with your friends to battle, loot, and stack ridiculous power-ups across a cursed fantasy world. Fight toward escape, revive your homies, and get absolutely chadded as you evolve from goblin tickler to god slapper.

DYO is a mind-bending cooperative platformer for one or two players where you can hop between two halves of a split screen.

Embark on an emotional journey of losing the love of one's life. Manipulate time, solve puzzles, reshape surroundings as you push forward into the bittersweet recollections of a past life. This is a story about happiness and hardship, joy and sorrow. A story that all of us will one day experience.

Grocery Store Simulator is a 1-4 player co-op game where you build and manage your own supermarket by stocking shelves, setting prices, hiring staff, and customizing your store, all while expanding your business and keeping customers happy.

Serious Sam Classic: The Second Encounter is a high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Month February 2002!

Door Kickers is an innovative realtime strategy game that puts you in charge of a SWAT team and lets you command them during a tactical intervention.

Delivering a visceral WWII gaming experience, Company of Heroes redefines RTS by bringing the sacrifice of heroic soldiers, war-ravaged environments, and dynamic battlefields to life. This legacy version also grants access to the latest version of COH, just called "Company of Heroes".

Face the varied challenges of the Machine God Zir in ARENA, a standalone expansion for Synthetik: Legion Rising! Leverage the next level in gun-play and experiment with powerful tech in varied action packed Arenas!

{{An RTS inspired by the classics of the past!}} Making up for it's subpar retro graphics with fun gameplay and modern multi-threaded tech enabling huge battles to run smooth... Featuring singleplayer challenges, skirmish, sandbox, 10-player multiplayer & workshop modding.

Endless Alice is a third-person action-adventure game combining Roguelite elements, anime aesthetics, and endless possibilities. Choose characters with unique combat styles and embark on adventures! Play solo or with friends in cooperative challenges for up to 4 players!

Frag like it’s 1996 – this time with even more asses to kick! Join the world’s greatest action hero in Duke Nukem 3D: 20th Anniversary World Tour as he saves Earth once again, kicking alien ass and saving babes across the globe along the way.

Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.

Old Market Simulator is a 1-4 player co-op game where you manage your market by ordering goods, growing produce, raising animals, fishing, and crafting items in your workshop, while hiring employees and expanding your business.

Work together to solve puzzles and escape a desert island in this stylized multiplayer co-op adventure. Success requires more than just you and your partner thinking alike - you'll have to communicate and stay In Sink to overcome the challenges ahead.

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.

Run a cozy cat post office. Sort and deliver parcels from the daily boat, organizing everything your way. At night, the moon reveals hidden truths about packages. Clear a strange backlog, help locals, and unlock new abilities and destinations.

Cleaning Up The Puzzle Gallery is a cozy first-person organization simulator about cleaning up 5000+ puzzle pieces scattered across a gallery of ~200 famous paintings. Whether you want to relax and solve jigsaw puzzles to classical music, or min-max the fastest times, the gallery needs cleaning.

The STAR WARS™ Battlefront™ Ultimate Edition includes the STAR WARS™ Battlefront™ Deluxe Edition as well as the STAR WARS™ Battlefront™ Season Pass.

Command massive armies in this epic mech auto-battler. Draft your troops, customize your units, master your formations, and crush enemies in spectacular 3D battles. All strategy, no clickfest. Outsmart opponents in 1v1, 2v2, free-for-all, or Survival Mode.

Flock Around is a multiplayer bird watching game. Explore a nature sanctuary with friends, snap pictures of birds, and fill out the guide book!

Would you enjoy building CASTLES, traps and siege machines in MULTIPLAYER? And then undermine your opponents castle and collapse it with 2D PHYSICS & DESTRUCTION?

Gatekeeper is a fast-paced rogue-like. Go on a quest to chase down Chaos and reclaim the stolen Heart of Time, fighting your way through relentless enemy forces. Play solo or in 4-player co-op and become the next Gatekeeper!

The Greatest Penguin Heist of All Time is a sandboxy physics game for 1-8 players, with everything from sneaky heists to hilarious stupidity to baking pizzas. With continuous updates, plenty of maps, and hundreds of items, clothes and quests, it has something for everyone.

Squad-based action co-op featuring distinct loadout synergies and mission-based combat built for 1–2 hour squad sessions.

Spellmasons is a magical, tactical roguelike where you customize your spells. Play solo or team up with your friends in online multiplayer, and explore a deep magic system where clever combinations yield powerfully satisfying results!

Unravel the mystery of a cryptic box in this 2-player co-op puzzle game. Join forces as two detectives, solve cooperative puzzles, communicate effectively, crack the codes and outsmart the killer.

The year is 3015. The battlefields are dominated by war machines known as BattleMechs. Level entire cities and decimate the enemy in your BattleMech. Follow a quest for glory and revenge. Manage an expanding mercenary company. Fight alongside your friends with a four-player PvE co-op.