Doorways: Old Prototype

A free horror prototype built around first-person running and jumping

Saibot Studios · Released Oct 5, 2016

Reviews: Very Positive; 86% of 759
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 30, 2026
Steam Deck: Untested
Last update on Steam: 7 years ago; Apr 18, 2019
Minimum PC: 6800; 1 GB RAM · 0.2 GB disk; Full requirements

What is Doorways: Old Prototype?

This short, single-player horror platformer is an early prototype made before Doorways: Prelude, the series' first episode. You navigate its environments by running and jumping in first person.

For you if...

+you enjoy first-person platforming in horror settings
+you prefer brief experiences over lengthy adventures

Not for you if...

−you expect a finished game rather than a prototype

What players say

86% of 759 reviews are positive

Players praise the eerie atmosphere and the insight into the series' development. Some criticize awkward movement and unfinished areas with missing textures.

Screenshots and trailer

Doorways: Old Prototype system requirements

Minimum: 6800, 1 GB RAM, 0.2 GB of disk space.

As published by the developer.

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Minimum

OS: Windows XP, Windows Vista, Windows 7, Windows 8
Processor: Dual core CPU @ 2GHz (Pentium D or better)
Graphics: NVIDIA 6800, ATI 1950
Memory: 1 GB RAM
Storage: 150 MB available space
Notes: Keyboard and mouse or Gamepad

Does Doorways: Old Prototype have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Doorways: Old Prototype run on Steam Deck?

Untested Not yet tested by Valve on Steam Deck.

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS, Linux
Steam features: Family Sharing
Languages: Text only: English.

Does Doorways: Old Prototype use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam