Games like Poly Bridge 3

Build physically simulated rovers to transport awkwardly shaped cargo across the rugged terrain of Mars. Earn funds, unlock new parts, and use your ingenuity to help the Martians establish a new home. Playable solo or in online co-op!

Space Engineers 2 is a playable Early Access Alpha sandbox focused on engineering, exploration, and colonization in a fully destructible universe. Design and build ships, stations, and planetary bases while uncovering the story of Miro and Ivan Sokol. Help shape the future of the Almagest system.

Build and fly your own airplane! Complete missions to earn money, upgrade your plane, and discover new locations in an open world.

Put your engineering and problem solving skills to the test in this sandbox physics building game! Enjoy the freedom of completely gridless 3D sandbox building combined with hilarious ragdoll third person controls, offering a truly unique and hilarious "Enjeniring" experience!

Build and fly realistic aircraft. Use free-form fuselage and wing editor tools and tune your engines to recreate aircraft from any era or design your own.

In House Builder 2, you build your dream structures in a vibrant, open-world low-poly environment! Purchase materials for your work, load them up, and head off to diverse tasks in the ultimate building adventure!

Online voxel sandbox where you can build anything imaginable. Forget simple cubes – sculpt slopes, curves, and structures of any size with many realistic materials. Your imagination is the only limit!

Raise a city from the ground up and transform it into a thriving metropolis with the most realistic city builder ever. Push your creativity and problem-solving to build on a scale you've never experienced. With deep simulation and a living economy, this is world-building without limits.

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!

Build your dream railroad across a huge open world! You can build tracks and stations, drive detailed locomotives, and transport goods to earn money and experience. Play exciting Online Multiplayer sessions with your friends or create your very own sandbox!

3D platformer with a portal gun! Solve puzzles, exciting levels, become a master of portal travel.

Dive into a factory-building game with the focus on just that – building huge space factories! Design sprawling multi-level factories and satisfying production lines without limits. Tackle progressively challenging automation goals at your own pace, without the threat of enemies.

Embark on your creative journey of vehicle design, as you create and operate vehicles to survive this dangerous open world. Anymaker is a detailed and technical vehicle builder and survival game. Design your chassis, build your engine, connect components, and travel into the unknown.

Adorable spider chaos! Swing around the house, weave crazy structures, play with physics-based objects, and pull off chores with nothing but your webs and your wits in this madcap sandbox adventure.

Team up as two quirky construction workers in this fun 2-player co-op platformer! Carry a fragile glass window through colorful levels filled with challenges. Communicate and coordinate to dodge obstacles and solve puzzles. Can you finish the job without breaking the glass?

Myth of Empires is a multiplayer war sandbox game featuring a high degree of freedom and multiple civilizations. Players must survive, craft, create, and lead troops in their quest to conquer PVE or PVP territory and build their own empire. Xizhou Civilization Pack is now officially released!

a hostile interpretation of the immersive sim, where nothing is planned, and everything works

Bulwark blends casual and creative building elements with touches of strategy and exploration. It's an experimental mix of genres that can be enjoyed casually or as an epic conquest featuring naval units, air units, and fortresses.