Cataclysm: Bright Nights

Cataclysm: Dark Days Ahead (aka Cataclysm DDA or CataDDA) is an open source survival horror roguelike set in a post-apocalyptic and fictional New England. Unlike most roguelikes, it has no goal: the player is free to explore the procedurally generated map, clear areas of monsters, work with NPCs, and build shelters and vehicles. The gameplay is mainly based on day-to-day survival, and the game tracks parameters like hunger, thirst, morale, illness and temperature which the player must manage to stay alive. Like most roguelikes Cataclysm: DDA follows turn based gameplay. The world has support for seasons and dynamic weather conditions and the season lengths can be modified during world generation. A typical world has cities, towns, rivers, forests, bridges and other landmarks. Cities and towns generally have all the common establishments generally found in real world such as houses, departmental stores, malls, parking lots, swimming pools, hospitals, malls, etc. Exotic locations such as Science Labs, Military installations, missile silos can be found in remote places throughout the whole world. Latest versions have support for experimental 3-D buildings.

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

Change is an emotional homeless survival experience set in a randomly generated city with rogue-like elements. Explore, survive, earn perks, find items and more to develop your character and escape to a new life.

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

Star Control: Origins is a science fiction action-adventure game that combines planetary exploration, diplomacy with alien races, and one-on-one ship-to-ship space battles. Players captain a starship, sending a lander to survey planets, gather resources, and examine artifacts, then spending those resources on new technologies, weapons, upgrades, and ships from other races. The top-down Fleet Battles pit two vessels against each other and can be played against the AI or in multiplayer. It is considered part of the Star Control series but takes place in a separate universe from the original games.

A New Land, A New Life: Savage Lands is a gritty, brutal, first-person open-world fantasy survival experience in which players have only one goal: Stay Alive. Explore a world where days and nights are spent slaughtering vicious creatures, gathering scarce resources, building shelter and crafting powerful weapons needed to survive. Every decision counts, because one mistake can lead to an unfortunate encounter with death's cold embrace.

Sky Break is an open-world game on a stormy abandoned planet filled with wild mechas. Learn to master this world and to hack the mechas if you want a chance to survive.

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.

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

Rising World is an open-world sandbox game with randomly generated, fully destructible environments. Starting with the most basic of tools, collect resources to survive in the wildness. Evolve your world to create one of the biggest cities of all time or a gigantic castle, or simply let your imagination run riot! If being creative is all too much, just connect with your friends and get them to help. Rising World is a procedurally generated world, with fully textures landscapes, over 200 different building materials, loads of tools and many other items to help you create OR destroy your world without any restrictions.

In 30 days, help is coming... A mysterious radio transmission claims that help is inbound. You are Jacob Solomon: leader of a makeshift team trying to survive the aftermath of a devastating asteroid collision. The world you once knew is no more – buried deep beneath the constant snowfall. Your goal: keep your companions alive until rescue.