Explore a dark, abandoned underground complex filled with puzzles and secrets. Fight mutants and drones using a variety of weapons. Push, move, or throw objects to kill enemies, block entrances, or climb high places.

Sign in to add this item to your wishlist, follow it, or mark it as ignored

Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“As a solo developer, releasing in Early Access allows me to shape the game alongside the community - balancing mechanics, improving systems, and adding content based on real player feedback.

The game’s world, progression, and survival elements are best refined through iteration with active players. Early Access will let me test features in real gameplay conditions, gather suggestions, and ensure the final release is as polished as possible.”

Approximately how long will this game be in Early Access?

“There's still a lot to add and polish, so realistically I expect Early Access to last around two years.”

How is the full version planned to differ from the Early Access version?

“The full version will include all planned features along with a complete, fully realized first floor (level).

Planned features:
- More weapons, such as a sniper rifle, machine gun, rocket launcher, and additional melee weapons
- Item storage containers with shared space
- Weapon attachments like silencers, laser sights, scopes, and more
- Player and weapon upgrades (e.g., increased damage, health, and stamina)
- New enemy types, including sentry turrets, tentacle monsters, and other grotesque creatures
- An objectives system to support main story progression
- A map in the PDA to check your location and track unexplored rooms
- Weapon stats and the ability to change attachments via PDA
- Weapon durability system - weapons will jam or do less damage if not properly maintained
- Reworked older rooms and weapons (improved meshes and textures)
- More puzzles, environmental obstacles, and parkour elements
- Steam achievements”

What is the current state of the Early Access version?

“The game already features a variety of core systems, including interactive and physics-based gameplay, satisfying gunplay, inventory and item management, a robust saving system, and a sizable map filled with enemies and puzzles, along with small snippets of lore that give a taste of what’s to come”

Will the game be priced differently during and after Early Access?

“The price will increase once Early Access ends.”

How are you planning on involving the Community in your development process?

“I plan to stay active on the Steam forums (and Discord if you’d like to join), listening to suggestions, bug reports, and ideas from players. Regular updates and patch notes will keep everyone informed about changes, while feedback will directly influence the direction of the game.”
Read more

Buy LeftUnknown

 
See all discussions

Report bugs and leave feedback for this game on the discussion boards

About This Game

Live-D Corporation slowly took control of society, enforcing their power through a private army and secret human experiments. Captured and taken to a hidden underground complex, former soldier Marius was subjected to a serum meant to grant eternal life - instead he fell into a coma and awakened ten years later immune to the experiment, only to find the abandoned facility overrun by alien-like creatures created from failed test subjects that spread and destroyed the world.

Fight to survive, uncover what happened during those ten years, and find your way back to the surface.

DYNAMIC COMBAT

Combat is intense and grounded, with weapons that feature realistic recoil, bullet spread, and physical impact. Every shot matters, and every encounter can play out differently depending on how you use your tools and surroundings. Grenades can clear groups instantly, while well-timed environmental explosions can save precious ammo.

PHYSICS-DRIVEN WORLD

The world of LeftUnknown is built around physics and interactivity. Most objects aren’t just props - they can be moved, thrown, stacked, or used creatively. The environment reacts to your actions, letting you solve problems, fight enemies, or create opportunities using the world itself.

SURVIVAL & RESOURCE MANAGEMENT

Survival depends on preparation and smart decision-making. Your inventory has limited space and is weight-based, forcing you to balance firepower with essentials. You’ll need to monitor your health, stamina, and injuries, using med-kits, food, and bandages to stay in fighting condition. Scavenging, buying, and selling items becomes key to long-term survival.

ENVIRONMENTAL STORYTELLING

The story unfolds through exploration. Scattered notes and diaries reveal what happened inside the facility, but they also serve a practical purpose. Players who pay attention can discover door codes, and clues that lead to valuable rewards.

SANDBOX FREEDOM

LeftUnknown embraces player experimentation. Console commands allow you to spawn objects, enable god mode, or manipulate the world for fun. Whether you want a serious survival experience or a chaotic sandbox playground, the choice is yours.

NIGHTMARE MODE

Nightmare Mode offers a pure survival challenge for players who want to test their limits. Face endless waves of enemies and fight to stay alive as long as possible. Every kill earns points, and every second survived pushes your score higher. Compete against friends or players worldwide on the leaderboards and prove how long you can last when the odds never stop stacking against you.

*This game is made by a solo developer

Mature Content Description

The developers describe the content like this:

The game includes blood, frequent gunfights, and a grim post-apocalyptic atmosphere

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10
    • Processor: Intel Core i3-4170 or AMD FX-8120
    • Memory: 4 GB RAM
    • Graphics: Nvidia GeForce GTX 460 or AMD Radeon HD 5830
    • DirectX: Version 11
    • Storage: 2 GB available space
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10
    • Processor: Intel Core i5-4570 or AMD FX-6300
    • Memory: 8 GB RAM
    • Graphics: Nvidia GeForce GTX 1050 or AMD Radeon RX 460
    • DirectX: Version 11
    • Storage: 2 GB available space

Customer reviews for LeftUnknown About user reviews Your preferences

Overall Reviews:
3 user reviews (3 reviews)






To view reviews within a date range, please click and drag a selection on a graph above or click on a specific bar.




Filter reviews by the user's playtime when the review was written:


No minimum to No maximum

Show reviews in selected display order





Learn More
Filters
Excluding Off-topic Review Activity
Playtime:
Played Mostly on Steam Deck
Operating System:
CPU:
GPU:
Device Type:
There are no more reviews that match the filters set above
Adjust the filters above to see other reviews
Loading reviews...