36 Building · Level Editor games your group can play together online, including Slip & Skid, Age Of Warbots, and Avakin Life.
All games: 24
Race against your friends and alter the track by placing obstacles after each lap. Change the rules mid-game with roguelike modifiers. Shove your opponents off the track, drift, boost and jump. Up to 4 players online and local split-screen.
A sandbox battle simulator game where you can build your own shape-shifting warbots, program their AI, and watch them smash each other up on the battlefield! Join the battles yourself by taking control of the warbots! Use Steam Workshop to check out warbots created by players from around the world!
Avakin Life is an endless social world waiting for you. Live your dream life, from unique and customizable avatars to stylish fashion outfits and personalized dream homes. Hang out with friends, join parties, and embark on adventures in a world where you are in control of everything.
Explore quiet liminal spaces that feel familiar, yet strangely wrong. Walk, climb, and swim through five handcrafted stages, then build worlds of your own in a powerful sandbox. Publish them through LIMSCAPERS, visit other creators’ spaces, and explore together in Multiplay Beta.
Build your robot. Battle your robot. Robot Rumble 2 is the premier robot combat building simulator, where you create your robot from real-world inspired parts, then drive it in the arena to defeat other robots.
Welcome to WE ARE FOOTBALL 2024! Dive into the world of football like never before. Choose an existing club or start your own. Manage either men or women, lead your club to new heights, and become the next manager legend!
Developed by the creator of the original Kerbal Space Program, KitHack Model Club is a physics-based model building sandbox that offers limitless freedom for you and your friends. Design, build, battle, fly (and crash!) your very own RC vehicles, or experiment with over 2,400 ready-made vehicles!
Explosions. Tanks. Bosses. And more explosions. Crazy fun with your friends. Hundreds of maps. Boom.
Meet Your Maker is a building game of brutal expression and conquest. Unleash your inner evil genius in co-op or single-player to build the ultimate fortress of devious deathtraps, or take on those built by others in a high-stakes heist to steal resources essential for your survival.
The Genesis Project is an attempt to replicate Sburb from the popular webcomic Homestuck, made by Andrew Hussie.
Drive, Explore, Operate and Create the railroad of your dreams - and now you can collaborate in real time with Multiplayer Surveyor! TRS22 showcases a range of high quality routes, sessions and trains to drive, plus all the scenery you need to make your own masterpiece.
Drive, Explore, Operate and Create the railroad of your dreams - and now collaborate in real time with Multiplayer Surveyor! And with Trainz Plus memberships, you get more content, more features and the latest Trainz has to offer!
TaleSpire is a beautiful way to play pen and paper RPGs online. Bring your stories to life and embark upon campaigns together with your friends, regardless of where you are in the world.
Car racing game with soft-body damage, race track builder, track database and multiplayer
Welcome to Zeepkist! You race soapboxes down hills!
The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.
Multiplayer jigsaw puzzles with voice chat! Play on your own or with friends, and feel like you're all sitting around the same table. Millions of puzzle images, upload your own, or create any puzzle you can imagine just by describing it!
Become a King (or Queen) at making levels! Join a community designed around level creation and online play. The level editor is simple to use and lets you create anything, even living creatures!
Besiege is a physics building game about constructing medieval machines to annihilate armies, obliterate castles and overcome challenging obstacles. Conquer the campaign or skirmish with friends in Multiplayer!
The SpellForce 3: Versus Edition gives you the chance to enter the battlefields of Eo for free, letting you test your RTS skills against AI opponents or even other human players.
An open-ended factory management game with RTS and tower defense elements.
Competitive tower defense meets arcade action and gets rolled up with ACE Team's quirky, Monty Python-esque humor into one giant, creative game for the ages. This time around, you can even make your own levels!
Parkitect is a business simulation game that charges you with the construction and management of theme parks! Bringing back the best of classic theme park games with many new features and content on top. Now supports online co-op with up to 8 players!
Build your own model railway tracks and scenery or explore pre-made maps, including 1000s of player-made maps and mods on the Steam Workshop! Play solo and in multiplayer, both in virtual reality and on PC!