Screenshots
Watch trailer on Steam ↗Deep Sheol
Sons of Welder, Acid Arrow Studio · Published by FM Simple Games Studio, Acid Arrow Studio
Content notice: The game may contain content that is not suitable for all ages or is inappropriate for viewing at work: violence, gore, alcohol, drugs
Positive — 94% positive (36 reviews)
Last updated 28 Sept 2026
In a dystopian future, Agent Seth investigates a corporate geological facility where a biological gas turned people into bloodthirsty monsters. Fight through enemy hordes, uncover a dark corporate conspiracy, and face Lovecraftian nightmares in this tense retro FPS with survival horror!
Action, Adventure, Indie · 2026 · More free games
Venture into a tense retro FPS where you play as Agent Seth, battling hordes of monstrous creatures in Sons of Welder and Acid Arrow Studio’s Deep Sheol. Unravel the horrors within a dystopian corporate facility plagued by Lovecraftian nightmares.
About this game
In a dystopian future ruled by ruthless corporations, Special Agent Seth embarks on a mission to uncover why a secretive mining base for a new biological gas has gone silent. A nightmare awaits him: the gas has transformed the workers and nearby townsfolk into bloodthirsty zombies!
Fight through hordes of enemies, unravel the corporation’s dark conspiracy, and face Lovecraftian monsters in this fast-paced retro FPS with survival horror elements!
Game Features:
Dark, industrial retro vibe inspired by classic FPS games.
Resource management: ammo, meds, and food—every decision counts.
Player vital stats system that impacts gameplay.
Environmental analysis system highlighting key items and mission objectives.
Complex logical and environmental puzzles.
Unique blend of Lovecraftian mythology and dark sci-fi.
Dynamic soundtrack that heightens tension.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: AMD Ryzen 5 1600 / Intel Core i5 3470 @ 3.2 GHz
- Memory: 6 GB RAM
- Graphics: GTX 750 Ti
- Storage: 3 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10+
- Processor: AMD Ryzen 5 1600 / Intel Core i5 3470 @ 3.2 GHz ++
- Memory: 8 GB RAM
- Graphics: GTX 950
- Storage: 3 GB available space
Supported Languages
Latest news
Patch NotesOfficial
Gamepad Connection Indicator
I added an icon showing if a controller is connected and solved the problem with the mouse cursor disappearing (when plugging/unplugging the gamepad) on the language selection screen and main menu.Huge thanks to the user who let me know about this bug!Cheers,PaulRead full article on Community Announcements (Acid Arrow Studio)Patch NotesOfficial
New Demo Update: Crosshair Customization & Bug Fixes
I received feedback that not everyone likes the default crosshair, so this update introduces new options along with some fixes:- Crosshair updates: Added 3 alternative variants and the option to make the crosshair invisible.- Audio fix: Resolved the issue with disappearing sounds.- General: Fixed several minor bugs.Read full article on Community Announcements (Acid Arrow Studio)Patch NotesOfficial
Demo update
Major Demo Update!I am continuously working hard on the game and reading all of your suggestions. Thank you so much for the amazing feedback!List of changes:- Increased inventory capacity – more space for your essential gear. - Workbench & Crafting – a new workbench has been added, allowing you to craft items. - Input Mapping – you can now fully rebind your keyboard and mouse buttons in the input menu. - New Enemy – a new threat has been spotted in the depths. Be on your guard. - Immersive Status Effects – consuming alcohol or psychoactive substances now triggers unique visual distortions and post-processing effects. - Expanded Demo AreaIMPORTANT NOTE ON SAVE FILES:Due to significant changes in the inventory system and game logic, previous save files may not be compatible with this version. To ensure all new features work correctly and to avoid any technical issues, starting a new game is highly recommended.Thank you for your support and stay tuned for more!Best regards, PaulRead full article on Community Announcements (Acid Arrow Studio)AnnouncementsOfficial
New settings option: Toggle for Dynamic Music
You can now turn off dynamic music completely – perfect if you prefer a constant vibe or pure silence while descending into Sheol.Read full article on Community Announcements (FM Simple Games Studio)AnnouncementsOfficial
Deep Sheol - New enemies: Mechanical horrors [game development]
Meet the Mechanical Spider-Cyclop – big, leggy, and watching you with ONE eye. Paired with the Vulture Sentinel drone for aerial hell.Read full article on Community Announcements (FM Simple Games Studio)
