SimplePlanes
Build airplanes by snapping parts together, designing wing sections, and attaching engines. At any time, you can strap yourself into the cockpit and see how it flies with realistic physics. If you're not in the mood for building, over 100,000 airplanes are available to download for free.
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Stormworks: Build and Rescue
Join a world where you design, create and pilot your own air sea rescue service. Release your inner hero as you battle fierce storms out at sea to rescue those in need.
Lakehopper
Take flight in a seaplane flight simulator through a rugged world where you are responsible for the care and maintenance of your plane. Deliver cargo between far-flung communities in a flooded landscape that challenges your piloting skills! Fix your plane and keep flying!
GearBlocks
Explore a world of creative building, interactive machines, and gears - lots of gears. Build all things mechanical: cars, trucks, cranes, tanks, gearboxes, engines, clocks, anything you can think of. Test your creations to destruction in challenging scenarios, and share them in the workshop!
Sea of Craft
Hello! Captain! “Sea Of Craft” is a sandbox ocean-building game with realistic physics simulation. In “Sea of Craft”, you can build your exclusive ship with hundreds of materials, and explore intriguing stages on planet Beella as well as adventures of wonders in the great ocean!
Avorion
A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.
Goat Simulator 3
Pilgor's baaack! Gather your herd and venture forth into Goat Simulator 3; an all-new (at least on Steam), totally realistic, sandbox farmyard experience. Invite up to three friends in local or online co-op, create carnage as a team, or compete in mini-games and then not be friends anymore.
ACTION SANDBOX
A physics sandbox game for people who like to play with digital toys. Create, control toys and define your goals.
Space Engineers 2
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.
Transport Fever
Transport Fever is a railroad-focused tycoon game. Players start in 1850 and build up a thriving transport company. As an emerging transport tycoon, the player constructs stations, airports, harbors and makes money by connecting areas requiring transport services. Build up your own Empire!
Tracks - The Train Set Game
Jump into the ultimate toy sandbox and build the train set of your dreams! Create colourful railway systems, decorate beautiful towns, transport commuting passengers, and even ride your train in first-person.
Brick Rigs
Do whatever you want in a physics sandbox full of chaotic destruction, endless player-made creations and unpredictable adventures. Build, destroy, roleplay and mess around solo or with friends!
Kerbal Space Program
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
Poly Bridge 2
The acclaimed bridge-building indie-hit is back! More levels, more features, more physics fun!
Ultimate Ragdoll Game
Ultimate Ragdoll Game is a Sandbox game without any limits. Have fun with ragdolls available in Steam Workshop and build your very own constructions using wide variety of blocks.
From the Depths
Over 1000 unique components allow you to build and command voxel vehicles from the deep ocean to outer space! Forge strategies, allegiances and fleets strong enough to destroy eight deadly factions of the planet and reign supreme. A genre-defying mashup of simulation, building, RTS and RPG.
Scrap Mechanic
Enter the creative paradise of Scrap Mechanic! Build fantastic machines, go on adventures with your friends and defend against waves of evil Farmbots in this imaginative multiplayer survival sandbox. With Scrap Mechanic’s powerful creation tools you can engineer your own adventures!
Breakwaters: Crystal Tides
Survive in a world ravaged by massive Titans and an ever changing ocean sim. Displace water to find resources for building and crafting unique items. Swim, sail, and fly to explore new islands and fight Titans.
Demolish & Build 2017
Become a boss of Demolition & Build company. Destroy small wooden huts and huge concrete buildings. Manage your workers. Invest earned cash in your own land properties and rent them for profit in open sandbox world. Use various hand tools, buy new machines and customize their parts.
Space Engineers
Space Engineers is a sandbox engineering game where you design and build ships, stations, and planetary bases in a fully destructible environment. Explore planets and space, mine resources, survive hazards, and engage in combat alone or with friends in Creative or Survival modes.
Fireworks Mania - An Explosive Simulator
FIREWORKS MANIA is a small casual explosive simulator game where you play around with fireworks, create beautiful firework shows or just blow stuff up.
Garden Paws
You have inherited your grandparents farm as they set off to travel the world. Work with Frank at the local construction shop to finish off the final touches on your new home. Aid Frank and Mayor Wilson in building up the town so it may reach it's full potential.
Fun with Ragdolls: The Game
Become a ragdoll and create your own environments in Sandbox Mode, explore worlds created by others, or just flop around your destructible sets! Fun with Ragdolls®: The Game lets you enjoy everything you love about ragdolls!
Landlord's Super
Your quintessential construction simulator is here. Take a dodgy loan, restore a property, move in the locals, attend to their grievances, then celebrate with a pint in this fully-simulated, open-world 1980's Britain.
Sandustry
Explore and mine fully destructible worlds. Automate increasingly complex production chains. Delve deep to uncover an ancient civilization’s powerful secrets and learn to love the sand in this factory game where every pixel is a valuable resource.
Poly Bridge
Unleash your engineering creativity with an engaging and fresh bridge-building simulator with all the bells and whistles. Enjoy hours of physics-based puzzle solving in the Campaign and then jump in the Sandbox to create your own bridge designs and puzzles!
Juno: New Origins
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and make your own. Share your creations online. Complete contracts, conquer milestones, and unlock technology in the newly added Career Mode.
Interstellar Rift
Interstellar Rift is an open world starship simulator with an emphasis on ship construction and multi-player interaction. Survive in a hostile galaxy with your own custom designed and constructed starship. Invite other players to join your crew or fight them across the galaxy!
Marble World
Marble World is a physics sandbox simulator with marbles. Create your own marble races, runs and machines. Customize a variety of tracks, decorations and marbles to create a beautiful world.
TerraTech
TerraTech is an open-world, sandbox adventure game, where you design and build your own creations through a mix of crafting, combat and discovery. Design vehicles from a huge library of blocks. Scavenge, craft and buy new parts to survive and become the ultimate planetary prospector.
Feather
Feather is a multiplayer game about exploration, relaxation and immersion. Transform yourself into a bird, take flight, and enjoy a zen-like, picturesque landscape on your own terms. Swoop, glide, and backflip your way around mysterious locations to uncover hidden paths that only birds can follow!
Cowboy Life Simulator
“Cowboy Life Simulator” is an immersive and relaxing ranching sim where you step into the boots of a failed businessman starting fresh on the frontier. Buy your first goat, meet the locals, explore vibrant lands, and build your dream ranch in a world full of stories and adventure!