# Johnny Mystery and The Halloween Killer

Summer DB entity ID: d6ba4e63\-20a2\-4fc9\-8078\-fd230ab91b32

Steam App ID: 1323600

On Halloween night, a young detective named Johnny Mystery comes across a girl trying to escape from the police\.   Then, Johnny tries to unravel an intriguing murder case that happened during a party at the Municipal Music School\.    This is a mystery visual novel with more than 10,000 words, multiple endings and a logic problem to be solved\.    Future chapters will be regularly released\.

## Game information

- Type: game

- Developer: Ma Ma Software

- Publisher: Ma Ma Software

- Release date: Jun 22, 2020

- Coming soon: false

- Free to play: false

- Parent Steam app: Not collected

- Genres: Indie

- Categories: Single\-player, Family Sharing

- Platforms: windows

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1323600/ss\_aa8ed683afcacd356950857c3a306c54310a9766\.1920x1080\.jpg?t=1728303595, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1323600/ss\_747f664062a8bdca794a8630bb258779b94822a2\.1920x1080\.jpg?t=1728303595, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1323600/ss\_654f4322f0f91fb071ea18ccb9ab2d4d27403f9c\.1920x1080\.jpg?t=1728303595, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1323600/ss\_c425eaf6a16c89eb5696a77758cc21131f0e5a65\.1920x1080\.jpg?t=1728303595, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/1323600/ss\_24ef6d7bb4d4a9bc73020cd7c134363b17057757\.1920x1080\.jpg?t=1728303595

- Price: 99 minor units USD; discount 0%

- Price country: US

## Observed metrics

- Current players: 0

- Steam review count: 29

- Steam positive reviews: 22

- Steam negative reviews: 7

- Steam positive percentage: 75.86206896551724%

- 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/d6ba4e63-20a2-4fc9-8078-fd230ab91b32/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/d6ba4e63-20a2-4fc9-8078-fd230ab91b32/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\-24T19:57:04\.362365\+00:00

- Details observed: 2026\-09\-25T00:28:55\.796791\+00:00

- Player count observed: 2026\-09\-25T00:28:57\.145065\+00:00

- Reviews observed: 2026\-09\-25T00:28:56\.826644\+00:00

Full provenance: \{"urls":\{"price":"https://store\.steampowered\.com/app/1323600/","catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/1323600/","players":"https://api\.steampowered\.com/ISteamUserStats/GetNumberOfCurrentPlayers/v1/?appid=1323600","reviews":"https://store\.steampowered\.com/appreviews/1323600"\},"price":"2026\-09\-25T00:28:55\.796791\+00:00","source":"steam","catalog":"2026\-09\-24T19:57:04\.362365\+00:00","country":"US","details":"2026\-09\-25T00:28:55\.796791\+00:00","players":"2026\-09\-25T00:28:57\.145065\+00:00","reviews":"2026\-09\-25T00:28:56\.826644\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":"f7f8c3e8\-83e4\-4c14\-9c75\-96216ecf8c7a","catalog":"78631186\-78f4\-4bab\-a203\-8c48e7f24f13","details":"1e7bfb8f\-aa28\-45b4\-b4c7\-9ee7eb113f83","players":"2e7bae81\-7475\-4dd3\-a70f\-9d8dba7854ab","reviews":"c56919d5\-8705\-4459\-9141\-27a13ac15cb4"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"d6ba4e63\-20a2\-4fc9\-8078\-fd230ab91b32","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/1323600/) · [JSON](/api/v1/games/d6ba4e63-20a2-4fc9-8078-fd230ab91b32)