Top similar games like Simplex Mundi:
Simplex Mundi FREE
Your spaceship shattered on an unknown alien planet. All around you there are harmful robots. Will you find a way out? Explore a stunning world full of dangers in this unique FPS and fight for your survival!
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BOXiGON!$2.99
The Original~BOXiGON! Can you open the box? 4 Skill Levels, 8 Dimensions, 72 Puzzle Variations. Solve your way to BOXiGON~MASTER!
Time Squared$14.99
Time Squared is an impressive shooter game that will immerse you into a powerful adventure where your combat skills and courage are required to survive. You’ll be fighting, discovering, driving the incredible “FENEC-081”, searching for truth through a lot of different environments.
BattleBeasts$4.99
Planet Shima attracts adventure seekers from all over the Galaxy BB-79 due to its unique resources. The mysterious effects on this planet made Artificial Intelligence of Shima aggressive towards all intelligent species of animals.
Beyond Contact$19.99
A fiercely formidable sci-fi survival game, set on a hostile alien world that wants you dead! Alone, or with a crew, do you have what it takes to survive?
Alien Mayhem$9.99
Alien Mayhem is an artificial open world sandbox game developed and created by Supa Serious. We simulate a what-if scenario where an alien prankster finds himself in a virtual game world that enables him to prank in a rather unconventional yet stylish way.
Magic and Legend - Time Knights$2.99
In Magic & Legend: Time Knights, players will follow the tale of the titular heroes as they travel through time to fight off alien invaders. Use Magic & Legends unique abilities to fend off the horde in this 8-bit style, action-adventure platform game.
Volcan Defend the Tower$14.99
A solo development and the first game of Processor Game Studios presents "VOLCAN defend the Tower". A third person shooter on an open world sci-fi game, play as Sollum to defend your Volcan Towers against your enemies while exploring a planet earth with nature restored
Celestial Impact Invasion$0.99
First-person Ability Shooter with fast-paced action, bosses, and multiple levels. A meteorite crashes, leaving a powerful resource that others are willing to do anything to obtain, alongside a dangerous creature that arrived with the meteorite. It's up to you to stop them and save the world.
SUNSET OF ATE$7.99
An open world TPS science fiction game
The Laziest Person In The World CompetitionFREE
Do nothing. Absolutely nothing. Compete with slobs from around the world in the ultimate contest of doing nothing. Stay passive the longest and be crowned The Laziest Person in the World.
Orion Sandbox Enhanced$1.99
This is a 2D crafting survival sandbox game. You will be able to explore a huge 2D side-view world, building houses, crafting tools, weapons and armour from the resources you collect. There is a day/night cycle and each night many dangerous monsters can be found and defeated.
Star Explorers$4.99
Planets, aliens, resources, upgrades, caves, mapping & documenting star systems ... seek a new home for the human race. An all-inclusive (admittedly janky) procedural space-sim made by solo developer Schmidt Workshops.
Medieval Engineers$9.99
Medieval Engineers is a sandbox game about engineering, construction and the maintenance of architectural works and mechanical equipment using medieval technology. Players build castles; construct mechanical devices and underground mining. There is an entire planet to explore!
Vortex: The Gateway$7.99
Vortex: The Gateway is an open world survival horror game with two game modes. If you want to survive then be alert, sneak, build and fight. Meanwhile life back on Earth changes dramatically. What changes? You will get bits of information through your adventure. Prepare for the worst!
Zyphoid$1.99
Look though the eyes and visor of bounty hunter Dugon as you follow him on his quest to exterminate the alien parasites called zyphoids and discover the truth about Planet Zyphamin its lost civilization and the horrors that lurk below the surface in the dark, waiting to come out.
Putin kills: Coronavirus$0.99
Great showdown 2020: COVID-19 vs BIGCOCK-19
Outpost Zero$19.99
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.
ATMOTECH EPISODE PRAELUDIUM$17.99
ATMOTECH is an action-adventure-jump-and-run game with some tricky skill claiming passages and some spaciously open ended areas. ATMOTECH is being released in episodes of which everyone has its on focus on certain aspects of the whole adventure.
Near Death$7.99
Stranded at an abandoned Antarctic research base with no hope of rescue, you must battle a deadly blizzard in a desperate fight to find your way home.
Angle of Attack$9.99
Angle Of Attack is the aerial combat action companion title to All Aspect Warfare. It features high-octane air combat against air, land and sea threats over vast planetary regions. See the action from a different perspective and get in on the action!
Dangerous Skies 80's edition$0.99
Enter the world of Dangerous skies, a shoot em up inspired by the mythical space invaders, you will face ten fantastic levels in full 80s style.
Mutant Frog$0.99
As a result of an unknown meteorite hitting an unknown planet, a poisonous gas began to spread on the planet. This gas began to mutate animals on the planet.
Exotic Matter$19.99
A blend of Metroidvania adventure and procedural survival game, in Exotic Matter you will explore, craft, fight, solve puzzles and survive. As the sole survivor of a last-ditch expedition to an alien planet, your duty is to find a powerful alien material that could save Earth from destruction.
Untravelled Planet$5.99
Discover the secrets of an unknown planet 🪐. Develop your weapons and equipment 🔫 to overcome obstacles and challenges in this action-adventure game inspired by the retro games .
Keplerth$14.99
Welcome to Keplerth! Try to survive on a hostile alien planet in this 2D sandbox RPG, where you can choose to live alone or fight side by side with your friends in the online multiplayer mode. Survive, build, farm, fight, and explore your way to victory in this open-world adventure!
多边星球 Multilateral Planet$1.99
The gameplay of this game is relatively novel, remove the brainless plot, remove the boring construction; Yes! It is to let you experience the fun of fighting strange bosses faster and better! Of course, you should also be prepared to be killed by the BOSS!
Phoning HomeFREE
A tale of survival about two shipwrecked robots - ION and ANI - on their life-defining journey in this unique genre-mix of exploration, puzzle and survival.
Planet ExplorersFREE
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.
Humanity Must PerishFREE
Humanity Must Perish is a short, comedic visual novel in which the fate of humanity is placed in the hands of a witty, pessimistic android.
Rover Wars$6.99
What if MOBAs and RTS games had a baby? Rover Wars combines resource management, farming, building and strategy into an intense tug of war. Fight in an interplanetary campaign and challenge your friends in the configurable Battle Mode. Rover Wars might be your gateway ticket into the strategy genre.
A Fox and His Robot$59.99
Become a fox and escape the grip of powerful Artificial Intelligences in a 2D action-platformer. A young fox and his robot search for meaning in a beautiful yet dangerous world.
Subnautica$29.99
Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.
Planet Nine$4.99
Control a customizable mech while exploring an alien world in a top down view. Your mission, set by an A.I. is to save the Ninth planet from an alien invasion. Gain levels, find loot and discover the history behind the Ninth Planet.
HIVE$4.99
Take on the role of a man forced to take down the Hive-mind that has taken over the world - One monster at a time.
Bullet VR$4.99
The year 2020. You are a real war hero, who has gone through a lot and seen a lot of bad things, but you has not seen anything like that. A huge threat has come to your favorite planet - the Earth.
Kick Ass Commandos$9.99
Lock and Load! It's time to Kick-Ass. Grab your machine gun, flamethrower, rocket launcher, and grenades. Assault the enemy base and free commandos to join your team while you destroy everything in sight. Make your way through enemy bunkers to rescue your comrades, and kill everyone you encounter!
In The Long Run The Game$9.99
Build and manage your space base - Survive in extreme environments - Explore Open World scenarios based on real topographic data - Gather Resources, Craft your items - Drive futuristic rovers and more...
The Fall$9.99
Take the role of ARID, the artificial intelligence within a high-tech combat suit. The Fall is a unique combination of adventure-game puzzle solving and side-scroller action, all set within a dark and atmospheric story. Get ready for a disturbing journey as you explore the world of The Fall.
Oozi: Earth Adventure$9.99
Oozi: Earth Adventure is a classic 2D platformer with old school gameplay - no puzzles, no punishment, just 100% pure classic platforming fun! Its most prominent features are HD visuals and beautiful hand-drawn art, but despite its visual style, it’s a good fit for all kinds of gamers!
Spirit Roots$6.99
Spirit Roots is a fun, old-school 2D platformer with a touching story and a happy ending. Your journey will take you through five atmospheric worlds, each with its own unique gameplay mechanics, enemies, and level design. Defeat the enemies to return to your family!
Roguelands$9.99
Embark on an epic journey in this hardcore Multiplayer RPG! As a Galactic Cadet, you and your Combat Squad of friends must brave hostile worlds in search of valuable loot and resources. Craft powerful gear, slay otherworldly creatures, and save the galaxy.
Dondar$1.99
Dondar - a high-speed platformer with puzzles coins and elements and a match of 3 elements.
Built Different$7.99
A short 3D platformer with a Rich story and a fun gameplay and challenging puzzle --Full controller support
Dude Simulator Six$4.99
Dude Simulator Six is an open world sandbox game. A mortal danger looms over humanity. The planet was invaded by representatives of a distant planetary system.
No Love LostFREE
Grab your ragtag crew & take up the Nectar Raiding trade on a dangerous planet that’s become all the rage! In this PvPvE extraction game for 1-10 players, compete against enemy crews to harvest as much Nectar as possible before night falls. But watch out, you're not the only one roaming this planet!
REDVIIL$5.99
Now it's 2143, my name is Alice, I was born in a small settlement called Gwaine. I dream to continue the work of my great-grandfather: to find a cure for the "Red Death" and release people living in hundreds of bunkers.
GearStorm - Armored Survival$11.99
GearStorm - Armored Survival is a story-driven, open-world sci-fi survival adventure. Discover what led to the Phage, a deadly virus apocalypse and our escape to a alien world. Explore a vast alien planet, build your base, create your colony, acquire vehicles, weapons, and supplies to defend it.
Tecroroid Assault$0.99
A synthetic race has come to your planet to steal your technology, And you have to fight them off. Fight off the Tecroroid invasion as they sent wave after wave of enemies to the planet.
U.F.O. K.O. Tower Defense$1.99
U.F.O. K.O. Tower Defense: Place lasers, missile launchers, sniper turrets, and use combat strategies such as airstrikes and the space ray to repel waves of alien invaders in this sci-fi tower defense game.
ORKANA CONFLICT VR$10.99
In the distant future, you take over earth's army on the planet Orkana. But the planet is not as uninhabited as expected. In rts based and first person combined gameplay you fight as a commander against the aggressive enemy and conquer the planet orkana.
Astronaut Adventure$1.99
The Astronaut's Adventures in the Vast Universe