# Mansions of Madness \- What Lies Within

Summer DB entity ID: f53f7819\-8028\-4da6\-b25a\-9b3907d2c622

Steam App ID: 558370

A murder in Southside leaves a home abandoned–except for the strange noises coming from the cellar…    What Lies Within is a scenario for 1\-5 investigators in which a murder is only the beginning of the inexplicable occurrences in one Arkham mansion\. Investigators will explore a murder scene, fend off terrible creatures, encounter strange phenomena, and investigate the noises coming from the cellar of the supposedly empty house\. They must discover why the victim was murdered–and what he did with his life before it was so violently ended–in order to leave the mansion alive\.

## Game information

- Type: dlc

- Developer: Fantasy Flight Games

- Publisher: Not collected

- Release date: Dec 19, 2016

- Coming soon: false

- Free to play: false

- Parent Steam app: 478980

- Genres: Adventure, Strategy

- Categories: Single\-player, Multi\-player, Co\-op, Shared/Split Screen, Downloadable Content, Family Sharing

- Platforms: windows, mac

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558370/ss\_7584544320bf42f18f1776ce016393e6de9d637b\.1920x1080\.jpg?t=1770399268, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558370/ss\_4af49d4b8f87c57832e4c6857d192a88ef8c8f14\.1920x1080\.jpg?t=1770399268, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558370/ss\_b66bce0d6575004b5f4aa9aed58239f26a7c4c6c\.1920x1080\.jpg?t=1770399268, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558370/ss\_85fa99fc12ca8c9e9e243dadd59d8f31410c3a0d\.1920x1080\.jpg?t=1770399268

- Price: 499 minor units USD; discount 0%

- Price country: US

## Observed metrics

- Current players: Not collected

- Steam review count: 47

- Steam positive reviews: 35

- Steam negative reviews: 12

- Steam positive percentage: 74.46808510638297%

- 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/f53f7819-8028-4da6-b25a-9b3907d2c622/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/f53f7819-8028-4da6-b25a-9b3907d2c622/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\-22T16:45:10\.507471\+00:00

- Player count observed: Not collected

- Reviews observed: 2026\-09\-22T16:45:11\.608869\+00:00

Full provenance: \{"urls":\{"price":"https://store\.steampowered\.com/app/558370/","catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/558370/","players":null,"reviews":"https://store\.steampowered\.com/appreviews/558370"\},"price":"2026\-09\-22T16:45:10\.507471\+00:00","source":"steam","catalog":"2026\-09\-28T16:58:32\.455488\+00:00","country":"US","details":"2026\-09\-22T16:45:10\.507471\+00:00","players":null,"reviews":"2026\-09\-22T16:45:11\.608869\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":"5d37856d\-5583\-4bd0\-a146\-f73e0cc9223b","catalog":"ebdbb18a\-b349\-440c\-94e8\-25bf6be57e39","details":"117a8797\-fe3c\-49fe\-9a1f\-2fd99500e2c2","players":null,"reviews":"e37d0203\-2228\-4fd3\-b760\-f315a61bb987"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"f53f7819\-8028\-4da6\-b25a\-9b3907d2c622","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/558370/) · [JSON](/api/v1/games/f53f7819-8028-4da6-b25a-9b3907d2c622)