Open now · By request
Undefined 339 playtest
by Psychosocial
Undefined 339 is a TPS Action Adventure game with a Robotics Science Fiction theme. A robot, powered by a human heart, tries to escape its endless dream by climbing upwards.
It's free to ask. The developer chooses who gets in.
- Access
- By request
- On playtest since
- Apr 27, 2026
- Planned release
- Coming soon
- Developer
- Psychosocial
- Platforms
- Windows
- Players
- Single-player
- Languages
- Arabic, Czech, English, French and 10 more
How to join the Undefined 339 playtest
- Open the game's Steam page with the Request access button. Sign in to Steam if it asks.
- Request access to the Undefined 339 playtest there. It's free and doesn't commit you to anything.
- The developer lets players in, often in batches, so it can take a while. Steam emails you when you're in, and the playtest appears in your library.
New to playtests? How Steam playtests work
About Undefined 339
A ROBOT POWERED BY THE HUMAN HEART
A robot, known as 339, is trapped in the depths of his mind, waiting to be rescued. A green robot, who does not reveal his identity, awakens 339 and explains to it who he is, where it is, and what he must do to escape. The zombie robots and robot soldiers it encounters on this adventure, meanwhile, lie in wait to clash with 339 as the main threat.
PORTALS THAT PLAY A ROLE IN SOLVING THE LEVEL
Portal doors within the level are used to overcome dead ends. These portals, which open to another location, play an important role in progressing through the level.
INFINITE ARCHITECTURE WITH A BLUE ATMOSPHERE
The ‘Dejavu’ section, with its infinite architecture and blue atmosphere, is a vast section that you must navigate by finding a way up, defeating the enemies you encounter and climbing your way through. To create a path, you must move the metal blocks around you, find a route through the water and press on. You must use the hook you carry at your waist, sometimes to slide down a rope and sometimes to latch onto a pole to swing from.
As you draw power from the human heart, you must nourish your heart with blood vials when your health is low. You must fight your way out of this vast environment, which is teeming with six different types of enemies: normal, invisible, armoured, and their virus-infected zombie variants. This adventure awaits you.
From the game's Steam page.
