Steam Playtests
Elysia Sector™: The Unknown

Open now · By request

Elysia Sector™: The Unknown playtest

by Harley Phoenix

Embark on a journey beyond humanity's extinction. This Survival Horror plunges you into the boots of Lyraeth Mortis, drifting from the twisted realm of Elysia to the cruel emptiness of Reality. Unveiling the Sector's dark secrets is your only hope for survival.

It's free to ask. The developer chooses who gets in.

Access
By request
On playtest since
Sep 12, 2026
Planned release
To be announced
Developer
Harley Phoenix
Platforms
Windows
Players
Single-player
Languages
English

How to join the Elysia Sector™: The Unknown playtest

  1. Open the game's Steam page with the Request access button. Sign in to Steam if it asks.
  2. Request access to the Elysia Sector™: The Unknown playtest there. It's free and doesn't commit you to anything.
  3. 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

How AI is used

AI generated voices are currently used as temporary development placeholders. All AI generated voice content will be removed and replaced prior to the public release. No AI generated voices will be present in the final build.

The developer's own words, from Steam.

About Elysia Sector™: The Unknown

Embark on a journey beyond humanity's extinction. This Survival Horror plunges you into the boots of Lyraeth Mortis, drifting from the twisted realm of Elysia to the cruel emptiness of Reality. Unveiling the Sector's dark secrets is your only hope for survival. This is a First Person experience, focused on blending Sci-Fi, Survival, Mystery, and Horror.

Feature Overview

  • Unique Horror Mechanics: Experience Lyraeth as the last of Humanity, or as an Elysian Goddess. Sleep, Visions, Prayers, and even Death, can help you drift between Reality and Elysia. Giving you both sides of the Story, slowly you'll bring them together, giving a much deeper understanding of Elysia Sector, and the unknown that lies beyond.
  • Intense Survival Mechanics: Manage your resources carefully, scavenge for supplies, and craft essential items to stay alive. Every decision counts in this unforgiving environment. You need to keep The HDFC'S MK5 Station running, alongside your own needs. This means Oxygen Parts, Cooling Parts, HDFC Weapons, Energy Items, Health Items, and much more.
  • Challenging Enemies: Face off against grotesque demons; and relentless malfunctioning AI's. Although most of the experience happens outside of Combat, self defence is vital. You need every HDFC Weapon and Tool at your disposal to truly survive in this game.
  • Dark, Mysterious, and Unique Narrative: Immerse yourself in this story filled with suspense and mystery. Through exploration, the environment, and lore, unravel the true fate of humanity and discover the dark truth behind the events that left Earth in ruins.
  • Impressive Graphics and Performance: This may be an Indie title, but all the Visuals have been carefully crafted to provide stunning graphics, with an optional Raytracing Mode, Modding Support, DLSS 3, FSR 3, and a year of optimisation, I'm pushing the standard for Solo Indie Games.
  • DEMONS Mode: Demons is a new mode, stripped of all the story moments. It hyper-fixates on combat mechanics, With 3 complete and unique maps. Introducing hundreds of demons, wave based survival, intense enemy types, and much more. With shorter loading times, shorter introductions, and shorter setup, each match roughly takes 10-15m.

HDFC Station

You're completely isolated on this HDFC Station, and keeping it running alone isn't going to be easy. You need to collect Power Circuits; Cooling Parts, and Oxygen Parts. This could mean exploring the dark and mysterious handcrafted areas using keycards. Or, exploring the procedurally generated areas; filled with traps, enemies, and loot. But your efforts are in not in vain; you can also find Construction Parts, needed for constructing your own Safe Space.

Elysia Sector

Understanding and uncovering the Sector's dark secrets can be difficult, as various areas of Elysia offer different types of Horror. Some will have you sprinting through tunnels; searching for somewhere to hide; before the inhabitants of Elysia catch you. Others will have you crawling through twisted environments; praying you'll find an exit in time, because while you stay in Elysia, time still passes in Reality. Cutting away at The Station's resources.

Lyraeth Mortis

But, there's more. You'll also need to look after yourself, with the complete and in-depth stats system, you need to keep your BPM; Health; Hunger; Thirst; Energy; and Treatment all under control. This means finding medicine, foods, materials, weapons, and tools to survive aboard The Station. This experience will be challenging, and stress-inducing.

Modding Support

The Modding Tools project included allows you to package new content directly into Elysia Sector: The Unknown. You can add new Gameplay Actors, and more coming soon. Most content you can import or create with Unreal Engine 4 is automatically supported. Note: This feature is still in an Early Beta, and still being improved.

From the game's Steam page.