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The Infectious Madness of Doctor Dekker
YOU are a psychiatrist, trying to solve a murder whilst treating the unusual patients of the recently deceased Doctor Dekker. Type a question - patients reply in full screen video and have questions for you too but be careful what you say. Your words determine their eventual fates, and your own!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.
“I'm going to give it a positive review, even though I quickly abandoned the game input method you're supposed to use. That's because the story is great, and I love the acting too. What you're supposed to do is type questions you think should be answered, based on what the…”
— a player, Steam review · 6 hrs played“incredibly innovative and a ton of fun. a real psychological thriller you can play in many ways.”
— a player, Steam review · 27 hrs played“I never reviewed this? This is an awesome FMV game.”
— a player, Steam review · 9 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-07-24 00:22 UTC · history via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-25. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Dekker 2 demo releasing next week
The Infectious Madness of Doctor Dekker 2 demo releases next Thursday ahead of Steam Next Fest! The full game sees six more patients on the couch including the return of Marianna and the demo contains
Doctor Dekker 2 cast revealed...
The Dekker 2 main cast has been revealed! Head over to the Doctor Dekker 2 Steam page to get the full bios of the cast and characters... please wishlist and / or follow Dekker 2 for more updates!
Murderous Muses is out now!
Murderous Muses is out now! 6 Suspects ːsteamthumbsupː New Couch ːsteamthumbsupː Aislinn De'Ath (aka Marianna) ːsteamthumbsupː Same writers ːsteamthumbsupː Doctor Dekker references ːsteamthumbsupː htt
Dark Nights with Poe and Munro launches
Our 3rd FMV game, "Dark Nights with Poe and Munro" has just launched along with a new Dekker patient, and a new Dekker bundle! Jump into 6 episodes of supernatural strangeness with The Shapeshifting D
A new Dekker patient is coming to the couch...
We're delighted to announce our latest Doctor Dekker patient, Elizabeth, who will be appearing first in a mind-bending crossover episode of Dark Nights with Poe and Munro. We did mention we're releasi
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-20.
| Genres | Adventure, Casual, Indie, Simulation |
| Player tags | FMV · Lovecraftian · Atmospheric · Dark · Indie · Story Rich · Detective · Mystery · Psychological Horror · Psychological · Singleplayer · Adventure (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Trading Cards · Family Sharing |
| Languages | English * * |
| Achievements | 35 |
| Estimated owners | 50,000 – 100,000 (SteamSpy) |
| Official site | http://www.doctordekker.com |
Minimum system requirements (PC)
Minimum: OS *: Windows 7,8,10 Processor: Pentium 4 SSE2 onwards (dual core) Memory: 2 GB RAM Graphics: Intel HD3000 or comparable Network: Broadband Internet connection Storage: 20 GB available space Additional Notes: Must be capable of playing full HD videos