The Powder Toy is a classic physics sandbox game, which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances

Take the helm in this realistic, large-scale maritime simulation. Command your fleet from agile rescue vessels to massive LNG tankers and perform precise maneuvers in challenging conditions. Navigate a living open world where weather, traffic, and every wave shape your career.

Crayon Physics Deluxe is a 2D physics puzzle / sandbox game, in which you get to experience what it would be like if your drawings would be magically transformed into real physical objects. Solve puzzles with your artistic vision and creative use of physics.

Replicube is an open-ended programming puzzle game/toy about writing code to replicate 3D voxel-based objects.  Solve puzzles, pursue leaderboard glory, or just make art to share with the in-game community.

NoLimits 2 is the ultimate roller coaster simulation that lets you experience authentic roller coaster thrills. Climb into the world's most famous roller coasters and experience the excitement in real time. Or design a new roller coaster that is engineered to your specifications.

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!

An approachable turn-based grand strategy sandbox. Lead a nation, forge alliances, wage wars and rewrite history. Play solo or with friends, create your own maps and scenarios, and explore community mods on Steam Workshop.