Top similar games like Boundless:

The ultimate block building game.

Have you got what it takes to survive on Mars? ROKH is a multiplayer survival game featuring scientific realism and extremely deep crafting and building. Make the red planet your sandbox and create a thriving colony.

Raft™ throws you and your friends into an epic oceanic adventure! Alone or together, players battle to survive a perilous voyage across a vast sea! Gather debris, scavenge reefs and build your own floating home, but be wary of the man-eating sharks!

Traditional survival in classic performance! This game is crammed with the joys, dangers and surprises of the genre. Your main task is to survive in a dangerous world. Put on the mask of a good-natured or villain, creator or destroyer, to get your place. Survive alone or in the company of friends;)

Begin a journey in the beautiful world! Build your own town anywhere and explore the myterious lands anytime. Nothing is impossible in the open world: Be a legendary warrior and 5-star chef at the same time!

Hardcore and realistic; LiF is a Medieval multiplayer sandbox RPG, with free terraforming, a rich crafting system and preset and modular building construction. With engaging survival aspects, no target physics-based combat and a unique formation system - along with numerous other features - LiF is not for the faint of heart!

Stranded on the shores of a mysterious island, you must learn to survive. Use your cunning to kill or tame the primeval creatures roaming the land, and encounter other players to survive, dominate... and escape!

Plague has left a trail of destruction across 14th century Europe. Survivors confront sickness and scarce resources in a land rife with banditry. Fight for scarce resources and learn new crafting techniques. But at all times you MUST avoid the plague. This is the land of ‘The Black Death’.

Renown is an intense medieval multiplayer survival experience set in a vast, ever-evolving world. Whether alone or rallying allies, gather resources, build powerful strongholds, and engage in brutal battles for dominance.

This massive online sandbox RPG features elements of magic, spellcasting, building, exploring and crafting. As a newly minted apprentice of the magic arts, you will set off to the dangerous world of Ignus. Tame mighty beasts, forge alliances, explore uncharted territories or fight for dominance!

The ultimate space sandbox. Participate in epic fleet battles, form alliances, strive to dominate entire galaxies and harness the universe’s resources for your industrious empire or the destruction of others. Customise your experience, the universe is yours!

The apocalypse has come, brought by pollution, wars and disease! Your mission is to save your land... or what’s left of it. Alone or with your friends gather, recycle, craft, build, plant, explore, fight & help survivors.

Wurm Unlimited is the standalone version of the fantasy sandbox world Wurm Online, the MMORPG where the players are in charge! A pioneer in the ideas of player influence, crafting and adventure, it is now one of the most deep and feature packed true sandbox experiences available.

Epic fantasy adventure meets competitive survival in Rend. Inspired by the fabled universe of Nordic myth, choose to play solo in Classic and Exploration modes to build your stronghold, tame brutal creatures, and conquer enemy players or play among three rival factions in Faction War mode.

You’re a castaway stranded in the middle of nowhere. Storm is gone, the worst certainly not. Look for food and resources, craft gear, make shelters. These are the basics, you need much more to stay alive on this cut-off-the-world, yet not desert island. Build & burn, sail & explore, be Out of Reach!

Planet Explorers is an open world sandbox adventure RPG game set on a distant planet. The game uses a new OpenCL calculated voxel system to allow players to change the terrain in any way, create new objects such as weapons, vehicles, objects, and do it anywhere.

A multiplayer game in medieval setting about survival, diplomacy, building of towns and conquests. Try to survive in wild nature, gather resources, create or join guild, build town and fight for glory or resources!

You miraculously survived the helicopter crash, finding yourself face-to-face with the local nature of the islands and the water element. You will plunge into the odyssey of survival and face unforeseen circumstances, find out the secret of these places and find a way to choose from here.

GRAV is a sand box experience where you explore a multitude of planets, hunt strange alien creatures, build and defend outposts, craft weapons and armor, and attempt to survive against other players in a hostile environment.

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!

Total Miner is an open world voxel sandbox game. It is primarily designed for creative RPG game builders, but also has two action/adventure style game modes where you can just jump in and play.

Explore space and build on other worlds in Star Rangers! Star Rangers is a space exploration and construction game that allows players to build habitats and spacecraft, acquire gear and explore the solar system.

Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive.

Explore, Adventure, Craft, Build, Survive. How will you shape your world? Astral Terra is a Smooth Voxel, Procedurally Generated Open World game with RPG and Survival Elements!

There isn’t much better than a wide open game world in which you have essentially no limits and can alter the very landscape in which you play – that is, unless you add dragons, of course…

Outpost Zero blends the genres of Multiplayer Base Building Survival and Simulation games in a Sci-Fi universe. On a lawless alien world, robotic scouts are tasked with building an Outpost for human colonists. Command AI minions, colonize the planet, and survive the perils of Gaiya.

Starbase is a hybrid voxel/vertex-based space MMO with a fully destructible and infinitely expanding universe, with a focus on building and designing spaceships and stations, exploration, resource gathering, crafting, trading, and combat.

Take the role of a plane crash survivor stranded somewhere in the Pacific Ocean. Come face to face with some of the most life threatening scenarios that will result in a different experience each time you play. Scavenge. Discover. Survive.