# The Devil's Calculator

Summer DB entity ID: a1708e06\-a28f\-4486\-aa05\-0763dfc0b333

Steam App ID: 1014280

Free Steam Key for Students & Teachers  Our 501\(c\)\(3\) non\-profit is committed to making our games freely accessible for educational purposes\. If you are a current student or educator with a \.edu or \.ac\.uk email address, get your free steam key by emailing us or following the instructions on our website\!   About the Game An evil calculator has its normal arithmetic operators replaced with sadistically obscure functions\. Using logic and a bit of algebra, you must work backwards to interpolate and use these corrupted operators to compute the 'number of the beast', 666, in order to purge the calculator of its demons and continue on\. Non\-profit and open\-source, The Devil's Calculator is a highly original indie game that's as addicting as it is educational\. Accessible to numberphiles and math novices alike, the first 20\+ levels are 100% free to play and enjoy in the game's Demo\. Features  Each level has you decipher the function of a mysterious operator and use it to calculate the number of the beast to progress\. The game features advanced graphing mechanics and access to various resources to help you interpolate and solve the innovative and creative function level design\. As you progress in the game, players unlock the ability to create their own levels and play challenges others have created \- including free DLC levels crafted by the game's creators, educators and mathematicians\. With hand drawn artwork and a charming story, the Devil's Calculator is an addicting and gratifying puzzle experience\. Non\-Profit  The Devil's Calculator was made by Cinq\-Mars Media is a 501\(c\)\(3\), a non\-profit organization developing technology to support scientific research related to human safety and education, and to make such technology and research available on a charitable basis\.

## Game information

- Type: game

- Developer: Christopher Cinq\-Mars Jarvis

- Publisher: Cinq\-Mars Media

- Release date: Feb 18, 2019

- Coming soon: false

- Free to play: false

- Parent Steam app: Not collected

- Genres: Casual, Indie, Strategy

- Categories: Single\-player, Family Sharing

- Platforms: windows, mac, linux

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1014280/ss\_928022010705226f8adff7c880a9984a59d5c5fd\.1920x1080\.jpg?t=1726125019, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1014280/ss\_ef69d0d444f7ef7935bd8b436e93b8ed6a76105b\.1920x1080\.jpg?t=1726125019, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1014280/ss\_e764b7e0545a734f8ef0ac0256213b086f70964b\.1920x1080\.jpg?t=1726125019, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1014280/ss\_3b307d293d6553b2b84554db43f79c8a6ea41467\.1920x1080\.jpg?t=1726125019, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1014280/ss\_5eb330d3e07c7cd1739e7e1302d62ebfcdb89263\.1920x1080\.jpg?t=1726125019, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1014280/ss\_75aee8f0f1c82ca7e71afd5339a25ac8e69b5d0a\.1920x1080\.jpg?t=1726125019

- Price: 299 minor units USD; discount 0%

- Price country: US

## Observed metrics

- Current players: 0

- Steam review count: 123

- Steam positive reviews: 118

- Steam negative reviews: 5

- Steam positive percentage: 95.9349593495935%

- Summer DB rating: No native votes

Review filters: \{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}

## Player history

[Seven-day chart data as Markdown](/api/v1/entities/a1708e06-a28f-4486-aa05-0763dfc0b333/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/a1708e06-a28f-4486-aa05-0763dfc0b333/player-metrics?days=7)

Chart values are hourly observed maxima. The sampled 24-hour peak and missing intervals carry explicit coverage; history before collection is unknown.

## Sources and freshness

- Catalog membership: store\_catalog

- Catalog observed: 2026\-09\-28T16:58:32\.455488\+00:00

- Details observed: 2026\-09\-24T01:20:47\.383153\+00:00

- Player count observed: 2026\-09\-24T01:20:48\.952888\+00:00

- Reviews observed: 2026\-09\-24T01:20:48\.350975\+00:00

Full provenance: \{"urls":\{"price":"https://store\.steampowered\.com/app/1014280/","catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/1014280/","players":"https://api\.steampowered\.com/ISteamUserStats/GetNumberOfCurrentPlayers/v1/?appid=1014280","reviews":"https://store\.steampowered\.com/appreviews/1014280"\},"price":"2026\-09\-24T01:20:47\.383153\+00:00","source":"steam","catalog":"2026\-09\-28T16:58:32\.455488\+00:00","country":"US","details":"2026\-09\-24T01:20:47\.383153\+00:00","players":"2026\-09\-24T01:20:48\.952888\+00:00","reviews":"2026\-09\-24T01:20:48\.350975\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":"9dd0ebf8\-5bec\-4420\-8679\-532296d1b753","catalog":"ea3df3d5\-f1ea\-4ab6\-9bc9\-fe1a148d274f","details":"a9692fec\-3aa3\-435f\-b45a\-b9898c8a8c40","players":"d2eebbb4\-a141\-4013\-ac8f\-67f0fb216cfd","reviews":"b50d797e\-6a79\-40a9\-b586\-4527ee78d712"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"a1708e06\-a28f\-4486\-aa05\-0763dfc0b333","revision":0,"observedAt":null,"methodology":"arithmetic\-v1","distribution":\[0,0,0,0,0,0,0,0,0,0\]\}

Steam reviews are not Summer DB votes. Missing data is not zero. Player counts are observations, not historical peaks. A supplemental record does not establish that a game was delisted.

[Steam store](https://store.steampowered.com/app/1014280/) · [JSON](/api/v1/games/a1708e06-a28f-4486-aa05-0763dfc0b333)