Games like Xsyon - Prelude on Steam
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Radiation Island
Radiation Island is a survival adventure game where you craft your own destiny in a huge open world environment. As part of the Philadelphia Experiment you have become stranded in a parallel, alternate reality. Discover this new and mysterious world, with all its surprises.
Orebound
Orebound is a voxel, factory, automation game set in a first person open-world. The King has tasked you to locate the elusive Emberstone. Go forth and use your Dwarven prowess and knowledge to mine, craft and automate through anything standing in your way - Build up or dig down! How far will you go?
Zenith: Nexus
Fight, explore, and lose yourself in an anime-inspired world built for VR. Two action-packed game modes available. How will you use your power?
RimWorld
A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
The Rule of Land: Pioneers
This is a survival game. After the coronation, human beings had to move into the underground. Fifty years later, some people thought the disaster was over and organized a survival competition on the surface. Some brave people took part in the competition . You are one of them.
Metro Sim Hustle
Take control of an underground commuter train and rise to the top in a bustling metropolis filled with cheap thrills, prime real estate, and a diverse community of unique characters.
How to Survive
“A real Gem” – Destructoid at E3 “Offers a different experience for zombie game veterans” – Co-Optimus“Has a lot more going for it than smashing brains and gory, red goo ... With a surprisingly deep crafting system” – GamesRadarYou're shipwrecked on an isolated island, a desperate castaway in a total freakshow world. How will you survive?
MISERY
MISERY is a 1–5 player co-op survival game set in a nuclear disaster zone. Here, every day is a struggle: search radioactive ruins for resources, build your bunker, craft weapons, and explore a weird, procedurally-generated world with your friends. Beware of anomalies, monsters, and armed bandits.
Albion Online
Albion Online is a fantasy sandbox MMORPG featuring a player-driven economy, classless combat system, and intense PvP battles. Explore a vast open world full of danger and opportunity. Grow your wealth, forge alliances, and leave your mark on the world of Albion.
Realms of Magic
Embark on a journey through the Old Kingdom in Realms of Magic - a sandbox RPG where you customize your character, choose your path, and immerse yourself in the fantasy world as a knight, wizard, miner, lumberjack, farmer, and more. After all, this is YOUR adventure.
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.
S.T.A.L.K.E.R. 2: Heart of Chornobyl
Discover the vast Chornobyl Exclusion Zone full of dangerous enemies, deadly anomalies and powerful artifacts. Unveil your own epic story as you make your way to the Heart of Chornobyl. Make your choices wisely, as they will determine your fate in the end.
Alien Marauder
“Alien Marauder” is a real-time strategy game with survival and confrontation theme. In this game, you will be the leader to a treacherous alien planet, build and defend base to survive against the vexan waves. Make the right decision!
Pax Dei
Welcome to a vast, social sandbox MMO inspired by the legends of the medieval era. Here, myths are real, ghosts exist, and magic is unquestioned. Join thousands of players as you explore the land, build your home, forge your reputation, and craft your own stories. What world will you make?
Mirthwood
Embark on an enchanting journey and brave ferocious creatures in an immersive medieval fantasy world. Will you settle a new homestead to live a life of farming and trade, or pick up the sword and take up the adventurers' path?
cyubeVR
Immerse yourself in a voxel game exclusively designed for VR. A beautiful infinite procedural world. Explore, gather resources, craft with your hands in 3D, and build anything you can imagine. Featuring great VR controls, near-infinite view distance, Steam Workshop mod support, and much more!
Fargone
Fargone is an RPG-based survival game with a strong focus on creating a living, breathing world through dynamic events, and NPC interactions. Set in a fictional land known only as The Barrens, you must survive by any means, whether that be alone or by allying yourself with a faction.
SpaceEngine
The world's first science-based photorealistic interactive 3D planetarium that models the entire Universe, using procedural generation for uncharted areas.
Chernobylite 2: Exclusion Zone
Explore the mysterious, beautiful, yet dark world of the Chornobyl Exclusion Zone in this post-apocalyptic action-RPG. Make your mark on this world, through your character development, choices and playstyle. But remember – everything has a price and consequences.
Once Human
Once Human is a multiplayer open-world survival game set in a strange, post-apocalyptic future. Unite with friends to fight monstrous enemies, uncover secret plots, compete for resources, and build your own territory. Once, you were merely human. Now, you have the power to remake the world.
Generation Zero®
Generation Zero is a stealth-action shooter where you wage guerilla warfare against lethal mechanical enemies. Explore a vast open world map inspired by the Swedish Cold War era, take part in the resistance alone or with up to three friends in seamless co-op.
DRAGON QUEST BUILDERS™ 2
DRAGON QUEST BUILDERS™ 2 is a block-building RPG set in a fantasy land threatened by an evil cult. Explore, battle, build and harvest in the charming single-player campaign or build big projects in the online sandbox mode for up to 4-players.