HAEX follows players tracking down missing members of their science expedition after waking from a helicopter crash.

Played solo or with up to three friends, an anomaly has appeared in the sub-arctic north, and as part of an expedition sent to investigate, players will need to discover not only the cause of the anomaly, but why part of the expedition is missing. Set in a hostile wilderness, alien creatures and machines are leaving the mist, and the elements kill as easily as they do.

Cold management, hunger, thirst, resource gathering, and loadout preparation determine how far players can go. The deeper they push into the mist, the more dangerous the world and enemies become. New threats require different combat tactics and skillful use of firearms, heavy melee, and specialised survival gadgets.

Alien seeds found or crafted by players can reshape parts of the open world. Planting them grants access to new pathways and resources, and changes the structure of the environment, for better or worse.

Progress carries across sessions, allowing players to bring their fully geared character into any world, including a friend's active game. Characters and worlds are saved separately, so each world maintains its own independent state and storyline.

“With HAEX, our ambition is to create an innovative, memorable open-world action adventure survival game that we, as players, would love to play and discover ourselves.” said Tobias Nyman, Creative Director & Co-Founder of Dead Astronauts, “We’ve poured a great deal of care, creativity, and hard work into building a universe where players can fundamentally reshape their world and determine their own path forward. Announcing the game at the Summer Game Fest is a massive milestone for the team, and we’re eager to see how players interpret and explore the mysteries of HAEX. ”

HAEX is in development for PC (Steam / Epic Games Store), with Early Access scheduled for 2027.