Room 40

A puzzle game about deciphering messages as a government codebreaker

Silhouette Valley Games · Released Jul 31, 2019

Reviews: Mostly Positive; 79% of 122
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 29, 2026
Steam Deck: Untested
Last update on Steam: 7 years ago; Oct 25, 2019
Minimum PC: One with OpenGL support; 4 GB RAM · 0.4 GB disk; Full requirements

What is Room 40?

Room 40 is a free, single-player 2D puzzle game about Amy, a recent college graduate recruited by a government agency. You use analytical tools to solve 16 coded messages and four bonus puzzles, tackling encryption methods ranging from ancient Greek techniques to World War II ciphers.

For you if...

+you enjoy solving word puzzles through careful analysis

Not for you if...

−you want easy puzzles with a gentle learning curve

What players say

79% of 122 reviews are positive

Players praise the satisfaction of cracking ciphers and Amy's story. Common complaints concern typos and cipher errors that interfere with solving puzzles. Recent reviews also criticize confusing controls, limited hints, and analysis tools that are poorly suited to more complex messages.

Screenshots and trailer

Room 40 system requirements

Minimum: One with OpenGL support, 4 GB RAM, 0.4 GB of disk space.

As published by the developer.

Can my PC run Room 40?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS: Windows 7/8/8.1/10 (32bit/64bit)
Processor: Intel Core 2 Duo or equivalent or greater
Graphics: One with OpenGL support
Memory: 4 GB RAM
Storage: 400 MB available space
DirectX: Version 9.0
Notes: Resolution of 1280×768 or greater

Does Room 40 have co-op or multiplayer?

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

Single-player

Does Room 40 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
Achievements: 21
Steam features: Family Sharing
Languages: Text only: English.

Does Room 40 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