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Steam

Subjects of Cthullius

Explore a distant solar system in a sci-fi adventure where mathematics becomes a real superpower. Solve puzzles, complete missions, upgrade your mathemagical abilities, and uncover a mysterious conspiracy.

Released · 2026-11-06

At a glance

About this game

Core game information and the store records it came from.

Title: Subjects of Cthullius
Content: Game
Release date: 2026-11-06
Developer: Yellow House Studios
Publisher: Yellow House Studios
Platforms: Windows, Linux
Connected stores: 1

Steam Steam source details

Store title: Subjects of Cthullius
Product ID: 4786300
Developer: Yellow House Studios
Publisher: Yellow House Studios
Store platforms: Windows + Linux
Source checked: 2026-11-09 13:10 UTC

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How you can play

Features and tags

Select a feature to find other games that have it.

Ways to play

Single-player

Controls & VR

Partial Controller Support

Accessibility

Store features

Family Sharing

Store tags

Genres

Adventure
Casual
Indie
Early Access

Categories and genres from the Steam store, observed 2026-11-09. Store tags from Steam, as players and the store apply them.

Compare & explore

One game, connected stores

Each store keeps its own prices and observations. We prefer the latest recorded EUR price for Europa. When the displayed currency differs from the store amount, a separate approximate value may use the latest available ECB reference rate.

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Lumiri price context

Recorded price comparison

Matching store titles. One currency. One market.

EUR SE

Lowest recorded amount

4.99 EUR

Steam

Recorded 6 days ago Over 48 h old

Difference between stores

—

One comparable store. A difference needs another matching store price.

Distance from observed low

At observed low

Steam listing only. Low: 4.99 EUR.

Last seen 2026-11-08

Newest included record2026-11-08 00:02 UTC

1 record is over 48 hours old.

1 included price record from 1 store · 1 linked listing

See the 1 included observation

Steam history →Subjects of Cthullius
4.99 EUR
2026-11-08 00:02 UTC6 days ago · over 48 h old

How this comparison works

Only original EUR amounts recorded for SE and matching titles linked to this game are compared. Edition words and numbers must match. Other editions, source-market fallbacks and currency estimates are excluded.

These are recorded observations. Check the store for the current price, availability and included content. Historical lows belong to the named listing in this market and reflect the history Lumiri GameDB has collected.

Steam

Subjects of Cthullius

4.99 EUR

Price recorded 2026-11-08 00:02 UTC

Player activity

Observed Steam player history

Latest 1,000 points at most. Bucket averages; the first bucket is included in full. Summary averages are approximate.

Last observed Steam players: 0
Observed peak · 1y: 0
All-time observed peak: 0
Average players · 1y: 0

View exact player observations

2026-11-09 00:00: 0 average players
2026-11-14 00:00: 0 average players

Observed by Lumiri GameDB during 1y. Times are UTC. Lines connect observations; gaps are not measured.

Open full player history

Samples: 2
Minimum: 0
Maximum: 0
Average: 0

Recorded prices

Price history · Steam

EUR observations for market SE. History belongs to the selected store listing; regional prices and taxes may differ.

Historical low observed by Lumiri GameDB: 4.99 EUR, last seen 2026-11-08

View 1 recorded prices

2026-11-08 00:02: 4.99 EUR

Prices observed by Lumiri GameDB in EUR.

Catalogue activity

Recent changes

Prices, release dates and store listing updates we detected. Repeated store refreshes are grouped.

Release date added Steam 9 Nov 2026

2026-11-06