Top similar games like I Thalassa:

Explore the ice-encrusted ocean of Jupiter's moon Europa.

Sinking Eternity is a single-player underwater exploration RPG. Survive extreme depths, hide from dangerous sea creatures, and uncover the secrets of a civilization lost for millennia.

Erzurum is a winter survival game which you will struggle against freezing temperatures, the wild nature, hunger and thirst.

SONOROUS – Deep Down Below is an unforgiving underwater first-person survival game set in a dystopian world. Find your sunken research to save humanity from an eternal life on the open sea in a continuous fight for survival.

While searching for a new home, an unexpected failure in your ship has left you stranded on a planet surprisingly similar to Earth. Discover a vast open world, hunt for food, develop technologies, and build yourself a new home to survive!

Sea Warden is a co-op survival game set on a living island carried across the endless ocean by a massive sea turtle named Ao. The sea, the wind, and the creatures beneath the waves are always changing.

Discover Voltcube, an infinite, uniquely generated block universe. Create machines, explore a multitude of biomes, and build to your heart's content. Survival or creative, every playthrough offers a unique journey.

Discover the mysteries of the Atacama, explore the abandoned mining networks, evade the scorching sun and survive the environment in one of the most arid place in the world. Arid is a FREE survival game made by students from Breda University.

Uncover ancient secrets, summon totemic magic, decode enigmatic messages, and explore the majestic Preseli mountains of Wales in this open world adventure inspired by a true story. Dare to embark on this journey and rediscover the lost secrets of a life lived with purpose and meaning!

Natives is an open-world/sandbox game with survival elements that takes place pre-Christopher Columbus. The land is raw, nature is at its peak and the seasons are full of change.

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.

Dig, Build, Explore! In this sandbox survival game, venture through a vast procedurally-generated infinite world. Mine resources, construct your homestead, craft and drive vehicles, delve into mining, cultivate, livestock, automated machinery, and uncover the truth behind the world.

Craft your settlement, survive the cursed island, and uncover its dark mysteries. Strengthen your character by mastering new skills, learning recipes, and gaining favor with factions. Battle the Blight, a lingering curse of black magic that threatens to consume everything in its path.

Build, Fly, and Survive. StarDune combines tactile, modular construction with seamless space travel. Reshape vibrant voxel planets, automate your outposts, and explore a procedurally generated solar system alone or with friends in a world that’s yours to mold.

A realistic open-world survival crafting game with dangerous illegal drugs. Explore, build your base, and combat enemy drug dealers to survive this hostile, procedurally generated wilderness.

You are a Horse. As a Horse with a freeform camera, it is you -vs- the world, surviving the elements & avoiding being captured. Increase your herd through your offspring, extending your lineage. Either play casually, exploring vast environments or go deep into the story & see how your Horse evolves.

The Gold River Project™ is a camping trip gone wrong in the Pacific Northwest. Explore, craft, build, and survive in this open-world experiment that traps you and up to 4 friends in this single player or co-op survival adventure game.

The aliens have caused the oceans to rise, plunging the world into the abyss. Survive, craft, and explore this mysterious underwater world. Build your base, defend it against relentless waves of enemies, and dive deep to uncover the secret that could stop the alien invasion once and for all!

Aldian of Ancients is a dinosaur survival/simulation multiplayer game set in a prehistoric world. Fight for survival, explore to find the wonders the land hides and craft your own stories.

Among the Trolls is a first-person survival-adventure game where the secret mysteries of Finnish forests are unraveled. Venture deep into the Finnish wilderness to uncover family truths and master the art of survival.

A journey of the last ocean cleaner submarine that is tasked to restore the ecosystem of a dying earth. "Plasticalypse: TrashSub Adventures“

Stellar Archipelago is a third-person base builder with a space western flair. Gather resources, build colonies on miniature planets, and grow your population to prove habitability. Unlock the warp junction and open your frontier system to future settlers.

FarSky is a short survival game in the depths of the Ocean. Collect all the pieces of your submarine and reach back the surface.

Experience the beginning of learning how to survive in an alien jungle. Harvest, Build, Craft and Explore this first dense biome among massive trees, plants, and hostile creatures to survive. Learn the ropes, build a base, and craft essential tools to survive and unravel mysteries.

A survival game set in the Ice Age where man and animal collide, work together with others or attempt to survive alone in these frozen lands.

Prepare for an enchanting journey as you dive into the mystical realm of Luminaya. You are braving a mysterious forest teeming with terryfing shadows. Use magical runes strategically to create enchanted orbs of light to drive away the shadows. Be vigilant and escape the ominous darkness!

KAI is a game of Exploration and Adventure between the sidereal space and underwater depths. Skillfully lure and guide groups of fish to solve puzzles, access new areas and uncover the truth behind the mission entrusted to you, Akira, and the other crew members aboard the ship.

Under the Sea is a 3D survival mini game based on time attack, race against time to survive, collect the lights and gain time to live in a world full of enemies.

Beyond Blue is a single-player narrative adventure that takes you deep into our planet’s beating blue heart. Explore the awesome wonder and unbounded mystery that exists within the world’s ocean.

A sandbox open-world survival set in a dynamic world of floating islands, each with its own ecosystem and climate. Explore and thrive by strategically exploiting these environments. Harness energy, strategically farm, craft your airship and much more, while uncovering the mysteries of this world.

In CREAMARE: The Game, players take on the role of divers to explore 9 real underwater cultural sites in the Mediterranean Sea. They must defeat a monster from the future by solving ecological challenges and puzzles related to the history of these sites.

In this semi-open world, cozy horse game, form a deep bond with your horse while you explore, forage, and craft. Using training techniques and knowledge passed down through the ages, tame a wild horse to ride through and discover the land's rich natural history in 1800s Idaho.