Games like Garry's Mod on Steam
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Universe Sandbox
Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.
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.
Bridge Constructor Portal
Enter the Aperture Science Enrichment Center and experience Bridge Constructor Portal – the unique merging of the classic Portal™ and Bridge Constructor™ games.
Bee Island
Take control of the hive and protect it from enemies. Build factories and defence, research technologies and, if necessary, use nuclear weapons, but do not let the enemies harm the queen!
Two Point Hospital
Design stunning hospitals, cure peculiar illnesses and manage troublesome staff as you spread your budding healthcare organisation across Two Point County.
Cubic Castles
Your blocks, your castle, your world! Build anything you can dream up and explore with other players! Cubic Castles is a mini-MMO that combines the best of block-building and 3D platform action! Create fantastic parkour challenges, explore worlds made by other players, or even make friend!
OpenTTD
OpenTTD is a business simulation game in which players earn money by transporting passengers and cargo via road, rail, water, and air. It is an open-source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe.
Cargo! The Quest for Gravity
Create crazy, yet functional, custom vehicles to solve missions with your own unique style!
SUMMERHOUSE
A tiny building game about beautiful lived-in houses. No rules or restrictions, just pure creativity.
Bad Guys at School
In Bad Guys at School you can play as students and revolt against school system by completing missions, or decide to become a teacher that must maintain order despite the violence and brutality in the school.
Goofy Gorillas
Relive your childhood nostalgia at Goofy Gorillas, the largest virtual jungle gym! Battle it out with your friends in a wide range of casual but intense PvP gamemodes, or chill out and take part in some extra activities around the venue! Make the Goofy experience your own!
Two Point Campus
Build the university of your dreams with Two Point Campus, the sim with a twist from the makers of Two Point Hospital. Build, hire staff and run an academic institution packed with wild courses.
Find 100 Ducks and Blast Them!
Yes! In this game you must blast 100 toy ducks! Relax, take aim, and let the feathers fly! With light-hearted gameplay and cute ducks to hunt, it's a casual first-person experience full of wholesome, family-friendly fun!
Gunscape
Gunscape provides easy-to-use tools based on a block-placement interface everybody's already familiar with to create all types of maps. Don't like building stuff? Then just blast your way through hordes of monsters or duel with other players!
GoreBox
GoreBox is a chaotic physics-driven sandbox where creativity meets destruction. Use the Reality Crusher to spawn, manipulate, and obliterate anything. Customize, battle with friends, roleplay, or face devious creatures. In this world, your imagination rules—and chaos is your playground!
Bridge Constructor
Become an appraised bridge engineer and architect in Bridge Constructor. Create and design your own constructions and watch the cars and trucks pass over them - or see them fall and crash while your inferior creations collapse due to weight and the laws of physics!
Townscaper
Instant town building toy
Planet Coaster
Planet Coaster® - the future of coaster park simulation games has arrived! Surprise, delight and thrill incredible crowds as you build your coaster park empire - let your imagination run wild, and share your success with the world.
Catlateral Damage
Catlateral Damage is a first-person destructive cat simulator where you play as a cat on a rampage, knocking as much stuff onto the ground as possible.
ZooKeeper Simulator
In ZooKeeper Simulator, there are two teams: Zookeeper vs Animals. Zookeeper must maintain the park by carrying out missions while animals must prevent them utilizing violence and pure brutality.