HR2

Garry's Mod is a physics-based sandbox game built on Valve's Source engine. In its base mode, there are no objectives. Players can spawn non-player characters, ragdolls, and props, then manipulate them using a physics gun that can pick up, rotate, and freeze objects in place. A tool gun provides additional functionality such as welding objects together or adjusting facial expressions on ragdolls. The game supports extensive Lua-based modding, and community-created game modes like Trouble in Terrorist Town and Prop Hunt have become widely popular in their own right. Originally released as a free mod for Half-Life 2 in 2004, it became a standalone commercial release in 2006 and holds the record as the best-selling PC-exclusive game.

Force of Nature is an indie open world sandbox game with fighting, crafting, building and farming systems.

Sol 0 is a real time strategy game where you establish the first Martian colony. From the first human footprints on Martian soil to a thriving and self-sustaining colony, Sol 0 imagines a near future using technology that could be available within the next few decades. Make use of minerals and resources across the Martian surface to expand from the first exploratory rover to an independent frontier.

Dude Simulator is an open world sandbox game. This is a life simulator. The main objective is to enjoy what you are doing.

Rise of Industry is a strategic tycoon game that puts you in the shoes of an early 20th-century industrialist. Build and manage your growing empire in a living, breathing, and procedurally generated world that is constantly evolving and adapting to your playstyle.

Academia : School Simulator is a management game that lets you design, construct, and manage the high school of your dreams! As the school Principal, watch your students as they get bullied, find love, flunk exams, and basically just try to get through the roller-coaster ride that is high school. Will you offer the best teachers and facilities or cheap out and build giant classrooms with a 1:100 student to teacher ratio? It's all up to you!

An interactive story game in which your choices can change everything.

Dude Simulator 2 is an open world sandbox game. This is a life simulator. The main objective is to enjoy what you are doing.

A brand-new spaceship sandbox MMO set in an alternate New Eden, the sci-fi universe of Eve Online.

Build a world for wildlife in Planet Zoo. From the creators of Planet Coaster and Zoo Tycoon comes the ultimate zoo sim. Construct detailed habitats, manage your zoo, and meet authentic living animals who think, feel and explore the world you create around them.