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Chronicle of Innsmouth: Mountains of Madness

Chronicle of Innsmouth: Mountains of Madness

After an encounter with a dreadful horror, detective Lone Carter’s investigation leads him to fateful places as Innsmouth, Arkham and the Antarctic, investigating a series of deaths and mysteries. Play also as Abdul Alhazred and H.P. Lovecraft himself in this Lovecraftian point’n’click adventure.

Released Mar 23, 2021 Developer PsychoDev, https://www.atomichorde.com/ Publisher AtomicHorde, https://www.atomichorde.com/ Platforms Windows · Mac · Linux AdventureLovecraftianGoreViolentPoint & Click
View on Steam ↗ $19.99 (US · as of 2026-10-25)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28.

73.8%positive122 reviews
Recommended · 0 found this helpful

“Chronicle of Innsmouth: Mountains of Madness is a deliberately traditional point-and-click adventure that embraces the unsettling fiction of H.P. Lovecraft while presenting it through the visual and mechanical language of early 1990s graphic adventures. Developed by PsychoDev…”

— a player, Steam review · 12 hrs played
Recommended · 0 found this helpful

“Great prequel to Chronicles Of Innsmouth, this game has vastly improved graphics, and changes to the left/right click interface. It follows Lone Carter's story following on from the flashback in the previous game. The first half takes place in Arkham, where you can explore the…”

— a player, Steam review · 7 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-02 via SteamCharts.

25all-time peak
0 5 10 2022 2023 2024 2025 2026 No data collected for this period No data collected for this period No data collected for this period No data collected for this period 9 avg · Mar 2021

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-10-21.

38achievements
37.0%median completion
3.8%rarest: The immortal
92.3% of players 74.2% of players 58.2% of players 55.0% of players 51.3% of players 49.9% of players 49.5% of players 47.9% of players 47.9% of players 47.1% of players 46.0% of players 45.8% of players 45.7% of players 43.2% of players 42.3% of players 42.2% of players 39.4% of players 39.3% of players 37.9% of players 37.0% of players 31.8% of players 30.0% of players 28.7% of players 26.7% of players 25.2% of players 21.5% of players 19.1% of players 14.6% of players 14.5% of players 11.1% of players 10.7% of players 8.5% of players 7.8% of players 6.7% of players 6.0% of players 5.8% of players 5.3% of players 3.8% of players 92.3% 0% most earned rarest
Almost everyone has
92.3%Origin — Your journey starts now.
74.2%The great escape — Don't get caught by the hybrids.
58.2%Chief scientist — Try to grab the list without electricity.
Rarest badges of honor
3.8%The immortal — Die in every possible way.
5.3%Stealth investigator — Get the shovel at night.
5.8%Pixel hunter — Never use the hotspot highlighter.

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-09-29. Steam prices vary by region — always confirm your local price on Steam.

$19.99current · sampled 2026-10-25 20:53 UTC
$7.99lowest since tracking began2026-10-01
US19.99 USD
EU17.99 EUR
UK15.49 GBP
Australia28.95 AUD
Canada22.79 CAD
Japan2,050 JPY
Brazil37.99 BRL
China70.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

Brazil≈$6.8 China Japan Canada US EU Australia UK≈$21

Cheapest → most expensive, converted to USD at ECB reference rates (2026-10-26). Relative comparison only.

$0 $25 $50 09-29 10-03 10-09 10-14 10-20 10-25

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Oct 26, 2026
Scream Fest: Mountains of Madness 60% off + free Curse of Chaos dem

Steam Scream Fest is here, and the cosmic horror of Innsmouth is on sale! Chronicle of Innsmouth: Mountains of Madness is 60% off until November 2. Wake up dying on a beach near Innsmouth, follow a tr

Oct 05, 2026
Curse of Chaos, the next chapter of the saga: try the free demo!

Mountains of Madness to the sands of Oman in 500 AD, the Chronicle of Innsmouth saga continues with Curse of Chaos , a Lovecraftian point-and-click adventure inspired by The Nameless City and Nyarlath

Jun 17, 2026
Mountains of Madness is now available in French!

Mountains of Madness is now fully playable in French! The whole adventure — every line of dialogue, every clue — has been localized into French. A warm welcome to our French-speaking players! Meanwhil

Dec 22, 2021
Spanish subtitles available!

Hi guys, we want to wish you a good Christmas holiday with a 20% discount (our highest yet!) for the Steam Winter Sales and a big surprise: we just implemented the Spanish subtitles to Mountains of Ma

Mar 23, 2021
Mountains of Madness is available now!

Hello everyone! Those who added the game to your wishlist will surely have noticed, but we’re going to share it with you one more time just in case: Chronicle of Innsmouth: Mountains of Madness is now

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From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

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Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-28.

GenresAdventure
Player tagsAdventure · Lovecraftian · Gore · Violent · Point & Click · Horror (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Steam Cloud · Family Sharing
LanguagesEnglish * , Italian, German, Spanish - Spain, French *
Achievements38
Official sitehttps://www.atomichorde.com/mountains-of-madness/
Minimum system requirements (PC)

Minimum: OS *: Windows XP or higher Processor: Intel or AMD CPU Memory: 2 GB RAM Graphics: 640x480, 32 bit colour DirectX: Version 9.0c Storage: 2 GB available space Sound Card: All DirectX-compatible sound cards Additional Notes: