Top similar games like Alt Oxygen:

Can you get out of the auto-generation insane maze alone or with friends? The maze is full of useless items for survival, what if they won't help you, but the monsters will overtake you!

Over The Ruins is a post-apocalyptic blacksmith simulator with retro graphics. The player can explore the world, collect resources, create machines, upgrade your house and of course, forge incredibly customizable weapons.

Join the top-secret mission to defend Area 51, the world's most enigmatic military base. With fast paced action, realistic combat, and a dynamic environment, 'Area 51: Beyond the Wall' will immerse you in a thrilling and challenging experience. Play now and see if you have what it takes!

Enter the thrilling world of Spheriums! Unravel the powers of the elders, forge power-ups, upgrade your gear and skill, and create weapon implants to save our civilization. Use your scanner to master the weapon twists or risk failure. The fight for survival begins!

Planet Conqueror is FPS science fiction game where you have to collect minerals exploring different planets. The main goal in the game is to upgrade your gear up to be able to defeat the Alien boss. Each planet generates randomly, making the possibility to explore 10 000+ different planets!

Eden: Project New Earth is a first-/third-person open world sci-fi survival game and lets you experience the adventure in single player or multiplayer just the way you like it. Play as you like, on servers or locally, with friends or strangers, together in PVE or against each other in PVP.

Survive the harsh wilderness of Isla de Barú. Deploy as Fireteams or Hunt as Dinosaurs and unleash carnage on the wasteland of an abandoned park.

Odyssey is a story driven space adventure audiovisual single/multiplayer game. Find a planet that could support life, but in order to get there you have to protect the exploration ship. The scientists hope to preserve parts of the Earth’s biodiversity. Humanity is counting on you.

A bus trip is a journey not a destination. You bought your first boat with your savings of the last 5 years and you find yourself stranded on an island in the Bermuda sea. You must take a very scary bus ride to get off the island ... but will the bus take you off the island?

Sci-fi survival game inspired by Subnautica and Star Wars. Drive speeder bike, collect resources, craft and explore an alien word.

DownhillMadness is an entirely new type of game. Shoot hundreds of projectiles and guide them through multipliers using your wind gun and toward goals to make the most money! Complete challenges, unlock levels, and discover new techniques.

Alien zombies survival game, open world survival.Game uses unreal engine 5

An open-world, story-driven survival game. Explore the wilds, collect resources, craft, build, and fight to survive! As the days pass by, you must stay alive on an alien planet, and find a way to contact help.

On your journey you will meet a wide variety of heroes who are as different as fire and ice. You will meet brave warriors who risk their lives for their beliefs, but also benevolent magicians who use their powers for the good of others.

'The Dreamer Must Die' is an RPG shooter where you're the only hope for a fading dream world. Advance the story, find new equipment, and improve your character within the MIND menu to ensure your survival.

LOST CONTACT is an exciting realistically designed space station shooter. As the main character of unflinching Nil Heard you will experience soul grabbing horrors of facing the mutant monsters of the Universe.

Fantasy Craft is a medieval fantasy life simulator with survival and RPG elements. Build, craft, hunt, go fishing, farm, cook, brew potions, explore the world, go treasure hunting and fight monsters.

Endure or Perish is an open world survival game played in the FP view. In order to survive you will need to gather resources from the land, manage your inventory, and build a base that you can retreat to when the going gets hard. Can you adapt and overcome? The choice is yours: endure or perish.

FIRESTORM: DEEP-DIVE is a first-person shooter survival game where you play as an elite member of Deep-Sea Diving Unit. Each player is equipped with K-78 Harpoon and the L-53 underwater Assault rifle to defend yourselves against the sharks.

Confront opponents and friends as a training robot in a maze arena. Playable online or in local up to 6 player, have some fun driving around and shooting everything you can with the help of power-ups and strategy.

Worlds Of The Future is a sci-fi open world, action/adventure game. Explore a fully seamless solar system full of adventures, mysteries and colorful characters. Build your space delivery company, climb the company rankings and become a legend among the worlds!

SPACE! What life is out there? Perhaps some little green men that are absolutely gun nut crazy! Shoot, Loot, and have a hell of a Hoot, Explore open worlds, Discover alien life, upgrade your arsenal, and fumble your way through the cosmos.

A Sleeper's Quest: A Labyrinth to Thee is a simple, unique and difficult 3D Maze Platformer that requires platforming precision, patience and memorization.

Altered Algorithm is an action-thriller VR experience blending the craft of film and games in a new way. In this story-driven game set in a futuristic 1983 LA, your playground will be detective work, head-to-head combat, and the ability to DYNAMICALLY interact with full motion video characters.

Set in the Mariana Trench inside a marine biology research laboratory, where everything goes wrong. Discover, scavenge, collect, and hide. Find out what happened and how to escape, if you can. Will you survive?

Gather resources, craft items, kill others, raid houses, but don't get raided yourself

SIK - Space Invader Kreature is a multiplayer shooter, a frantic experience of eliminating the hordes of invaders. Rush through the Wayans, unlock paths, create a strategy with your online friends and defeat all the invader kreatures.

You are the Nautikins, the dominant species on this ocean planet! Build boats, planes, and helicopters to explore a vast sea filled with islands and mysteries. Play in a sandbox with unlimited parts or a campaign where you strive to reach your goals. Embark with online multiplayer or singleplayer.