Dwarf Fortress

In this complex construction/management/roguelike simulation, every generated world brings a unique challenge, whether it’s dwarves with their own simulated personalities or aquifers. Observe what makes your civilization fall into eventual decline, and learn for next time… until something else inevitably goes wrong. The combat model includes skills, body parts, material properties, aimed attacks, wrestling, pain, nausea, various poison effects, and much more. It’s difficult to convey the depth of the generation. Hundreds of animals and monsters, many of which are randomly created for each world, as well as generated poetry, musical forms, instruments, and dances for your dwarves to practice and perform. A dynamic weather model tracks wind, humidity, and air masses to create fronts, clouds, storms, and blizzards. Over two hundred rock and mineral types can appear, in their proper geological environments.

A single-player fantasy RPG. The game can also be described as a Roguelike.

Dwarf Fortress is a single-player fantasy game. You can control a dwarven outpost or an adventurer in a randomly generated, persistent world.

The Battle for Wesnoth is a turn-based tactical strategy game with a high fantasy theme. Build up a great army, gradually turning raw recruits into hardened veterans. In later games, recall your toughest warriors and form a deadly host whom none can stand against! Choose units from a large pool of specialists, and hand-pick a force with the right strengths to fight well on different terrains against all manner of opposition. Wesnoth has many different sagas waiting to be played. Fight to regain the throne of Wesnoth, of which you are the legitimate heir... step into the boots of a young officer sent to guard a not-so-sleepy frontier outpost... lead a brutal quest to unite the orcish tribes... vanquish a horde of undead warriors unleashed by a foul necromancer, who also happens to have taken your brother hostage... guide a band of elvish survivors in an epic quest to find a new home... get revenge on the orcs by using the foul art of necromancy... There are at least two hundred unit types, sixteen races, six major factions, and hundreds of years of history. The world of Wesnoth is absolutely huge and only limited by your creativity — make your own custom units, create your own maps, and write your own scenarios or even full-blown campaigns. You can also challenge up to eight friends—or strangers—and fight in epic multiplayer fantasy battles.

Dig, Fight, Explore, Build: The very world is at your fingertips as you fight for survival, fortune, and glory. Will you delve deep into cavernous expanses in search of treasure and raw materials with which to craft ever-evolving gear, machinery, and aesthetics? Perhaps you will choose instead to seek out ever-greater foes to test your mettle in combat? Maybe you will decide to construct your own city to house the host of mysterious allies you may encounter along your travels? In the World of Terraria, the choice is yours!

Perfect World is a 3D MMORPG rooted in traditional Chinese culture and mythology. Set in the mythical realm of Pangu, it offers players an immersive adventure experience.

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

Hardcore medieval multiplayer sandbox with terraforming, free preset and modular building construction, rich crafting (smelting, forging, farming, animal breeding etc.), survival, no target physics based combat, original combat formation system and numerous other features. Taking place in the fictional medieval world, game imposes a realistic system of global politics, economy, and socialization.

In Junkyard Simulator you play as owner of scrap yard, which with his own hands is trying to create the largest junkyard in the area. The way you do it depends on your decision! Do you want to manually search and collect the best scrap?

Minecraft focuses on allowing the player to explore, interact with, and modify a dynamically generated map made of one-cubic-meter-sized blocks. In addition to blocks, the environment features plants, mobs, and items. Some activities in the game include mining for ore, fighting hostile mobs, and crafting new blocks and tools by gathering various resources found in the game. The game's open-ended model allows players to create structures, creations, and artwork on various multiplayer servers or their single-player maps. Other features include redstone circuits for logic computations and remote actions, minecarts and tracks, and a mysterious underworld called the Nether. A designated but completely optional goal of the game is to travel to a dimension called the End, and defeat the ender dragon.

Miscreated is a multiplayer online hardcore survival game set in a post-apocalyptic future. You will need to survive against mutants, players, and even mother nature herself.

Start a new life in the enchanting town of Portia! Restore your Pa's neglected workshop to its former glory by fulfilling commissions, growing crops, raising animals, and befriending the quirky inhabitants of this charming post-apocalyptic land!

Inspired by the adventure and imagination that we love from classic science-fiction, No Man's Sky presents you with a galaxy to explore, filled with unique planets and lifeforms, and constant danger and action. In No Man's Sky, every star is the light of a distant sun, each orbited by planets filled with life, and you can go to any of them you choose. Fly smoothly from deep space to planetary surfaces, with no loading screens, and no limits. In this infinite procedurally generated universe, you'll discover places and creatures that no other players have seen before - and perhaps never will again.