A downloadable EFA51 for Windows and macOS

An atmospheric sci-fi escape with stealth, mind-reading, and dialogue-based puzzles.

You are an alien the sole survivor of a ship that crashed on Earth. Sixty years have passed. You've been trapped in a stasis capsule deep beneath the surface, hidden inside a top-secret government facility.

But something has changed. Dissection is imminent.
And suddenly you have a chance. A chance to escape.

With the help of an onboard AI that once served your companion, you must navigate the base without being detected by special agents. To survive, you’ll need to scan minds, read thoughts, uncover fears…
And use that knowledge.

You can take on the identities of two scanned humans a soldier and a scientist. Only in disguise will you gain access to restricted zones and engage in dialogues where every word matters and one wrong move could cost you everything.

But not everything is as it seems. You still have questions. Why did your companion die? What really caused the crash? And can you truly trust those who claim to help you?

Puzzles. Tension. And a single shot at freedom.

StatusIn development
PlatformsWindows, macOS
Rating
Rated 5.0 out of 5 stars
(1 total ratings)
AuthorAlexArtBoy
GenrePuzzle
Made withUnreal Engine
Tags3D, Aliens, Atmospheric, Sci-fi, Top-Down
Average sessionAbout a half-hour
LanguagesEnglish
InputsKeyboard, Mouse
AccessibilityInteractive tutorial
ContentNo generative AI was used

Download

Download
efa51-mac-intel.zip 2.3 GB
Version 1 Jul 21, 2025
Download
efa51-windows.zip 2.5 GB
Version 1 Jul 21, 2025
Download
efa51-mac-arm.zip 2.3 GB
Version 1 Jul 21, 2025

Install instructions

Choose the version for your computer, download and play the demo. 

Minimum System Requirements:

Windows:

OS: Windows 10 (64-bit)

CPU: Intel Core i5-7600 / AMD Ryzen 5 1600

RAM: 8 GB

GPU: NVIDIA GTX 970 / AMD Radeon RX 560

Storage: 10 GB available space


Mac (Intel):

macOS: 12.0 Monterey or later

CPU: Intel Core i7 (2017 or newer)

RAM: 8 GB

GPU: Radeon Pro 560 or equivalent

Storage: 10 GB available space


Recommended System Requirements:

Windows:

OS: Windows 10/11 (64-bit)

CPU: Intel Core i7-9700 / AMD Ryzen 7 3700X

RAM: 16 GB

GPU: NVIDIA GTX 1660 Ti / AMD Radeon RX 6600

Storage: SSD with 10 GB available space


Mac (Apple Silicon):

macOS: 13.0 Ventura or later

Chip: Apple M1 or M2

RAM: 16 GB

Storage: SSD with 10 GB available space

Comments

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Pretyy cool game, I like the gameplay and story