Co-op & Multiplayer Games

a classic arcade shooter game. You can play with up to 4 people locally, or using Steam Remote play.

The original, uncompleted version of Vectorio. Claim resources, unlock new buildings, and expand your defenses as you fight back against enemy forces in the classic edition of Vectorio! Play for free now.

Cave Crawlers is a 1-10 player rogue lite set deep underground in a system of randomly generated caves. Players use weapons, spells, and talents to defeat the unique bosses and enemies found in each biome.

2-4 Sneaky and squeaky low-poly mice face off against a lone cat in the battlefield of a human house. Mice use proximity chat to communicate with other players, while the cat hunts their noises. Will the mice perform enough tasks to destroy the house, or will the cat defeat enough mice to save it?

Dummy Falls is a co-op game where you and your teammate tries to overcome various obstacles until the end.

Goi: Spooky Run is 3-10 players “Catch me if you can” online party survival game. Put your friendship to the test! Prank your friends, survive the ghost hunt, and be the last one standing in this chaos!

Crashed on a strange island, survivors must forage, craft, and complete objectives to stay alive. But ferocious beasts, harsh weather, and secret saboteurs seek to make sure they never escape. Betray your friends or survive the island in Betrayal Beach, a 4-8 player social deduction survival game.

Realm Engine is a system-agnostic Tabletop world builder that supports both building and running your choice of role-playing game.

Built from the ground up, Rock Life is the next generation of immersion and simulations. Live, do, and experience what it is like to truly become one with nature... as a rock!

This is the free version of the game "Ale & Tale Tavern". Get ready for a thrilling mix of genres: a cooperative, first-person, open-world fantasy tavern simulator, action, fishing, hunting, exploration, and completing fun and diverse quests. And, of course, COOKING!

Team up with friends and dive into adventure! Rescue dwellers, let them work for you so they farm resources and protect you from enemies. Upgrade your equipment, explore new lands, complete quests and fight evil with glory!

Free multiplayer 2D ghost hunting game that you can play with friends created by a small game dev team.

You're now a monkey*, the room is full of stuff*, collect the stuff in the cardboard box while running away from the possessed monkey. EASY! Don't get caught! And if you're the one possessed, catch every monkey and explode them into the Bananaverse*.

Zomcats Invasion is a coop online multiplayer game! Play with up to 10 friends and fight endless hordes of Zomcats! Choose between a variety of maps, difficulties and weapons. Unlock abilities and customize your cat to fit your style!

ST brings the most intense, tactical-action experience to Steam. Select your custom loadout, plan out strategies and accomplish your objectives. Addictive Survival mode and unrivaled multiplayer including Squads (1 vs 1, 2 vs 2, 2 vs 1)

CS2D is a free fast-paced top-down multiplayer shooter. Featuring many different game modes, a built-in map editor and much more.

Fetch some friends for fun, fast online multiplayer. One of you is the baddie! Everybody else is trying to find the baddie. The baddie is invisible. At least, most of the time...

The Genesis Project is an attempt to replicate Sburb from the popular webcomic Homestuck, made by Andrew Hussie.

Inspired by the party games Werewolf and The Resistance, MINDNIGHT is a cyberpunk online social deduction game of deceit, accusations and unpredictability. It challenges your ability to lie and detect others that are trying to be deceptive.

Calturin and Clone is a 2D co-op action RPG where you can either play as a lone adventurer or with a fellow wizard. Mainly focused on difficult boss fights and other challenging encounters that are not combat, Calturin and Clone will test you and your friend's skills to the limit.

The genre defining VR model train game. Build and ride the model train layout of your dreams without the cost and excessive model foam dust getting in your nose!

Demise of Nations is a 4X turn-based grand strategy wargame covering the rise of Rome till the fall of modern civilization.

Free Prologue to Technicity, a first-person city-building game with powerful tools that allow you to build faster and bigger. Design your own construction blocks and furniture in factories, terraform the open world, use vehicles to travel in cities that you or your friends create in solo or co-op.

Hail to the Captain! Sail into the heart of the Caribbean in the Age of Piracy - the time of black flags and white skulls, blue waves and golden opportunities. Hoist the Jolly Roger and grab the steering wheel to sail through battles and raids, ransoms and treasures, to become the Crimson King of the Antilles!

Darkness is coming. How long can YOU survive? Build your base by day, defend it by night. Play in online or local co-op. Stay alive as long as you can.

Pyroworks is a free-to-play online multiplayer game containing fireworks from real-life companies from all over the globe. You can choose to make your own show, cause destruction and chaos or simulate new years. Don't miss out on playing with your friends - the most fun part.

Throbax TD is the "Tower Defense" game you are looking for: Help Ughlar fight his way through 50 levels, buy over 100 upgrades and get all of the 50+ achievements.

A short sandbox rpg game that takes place on a square planet. Explore the world, gather resources, build a home and become stronger.

Relaxing city builder where you grow a vibrant metropolis, produce goods, manage transit and build iconic landmarks at your own pace.

Blip is a platform where players and creators come together to build, play, and share unique gaming experiences. An open-source alternative to Roblox.

Magic Rampage is a fast-paced action RPG platformer with a massive single-player campaign, deep character customization, and challenging dungeons. Master powerful gear, uncover secrets, and test your skills in competitive and PvP modes.

Build your café, brew perfect coffee, and sabotage your rivals in this chaotic multiplayer café simulator. Start small… and learn how far you’re willing to go.

Sentience is a multiplayer team hide and seek game set in a sci-fi dystopian world. Work together to take down the system or put a stop to the newly sentient resistance.

Shoot and drift around the chaotic streets of Strife City, a hub for crime, secret societies, paranormal activities and lots’a *CHA-CHING*!

A wave-based FPS for 1–4 players, made with passion by one dude! Pick your load out, mow down hordes, Roast Mr Hotdog and earn cash. Spin Vegas-style slots (random box) between waves for upgrades, compete for the best score, and see if your luck (and skill) can keep you standing. Can you survive?

Travel to the remote planet of Bazoik to free galactic citizens from the evil cereal-eating Flemoids! Venture deep into the caverns of Bazoik, using an array of "zorching" devices to send these nefarious foes back to their home dimension!