Whisper Mountain Outbreak

Isometric survival horror with cooperative scavenging, puzzles, and monster waves

Toge Productions · Released Aug 11, 2025 · Early Access

As of Oct 28, 2026: -20% right now, $6.39

Reviews: Very Positive; 82% of 2,510
Recent reviews: Very Positive; 87% of 31 in 30 days
Players: 36; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 2 days ago; Oct 26, 2026
Minimum PC: 1 GB VRAM; 4 GB RAM · 1 GB disk; Full requirements

What is Whisper Mountain Outbreak?

This is an Early Access isometric survival horror game set on fog-covered Mt. Bisik in 1998, after miners unleash an ancient horror. Alone or in online co-op, you choose a class for each run, search abandoned buildings, craft items, solve puzzles, and fight with melee and ranged weapons while seeking an escape.

For you if...

+you like sharing scarce supplies and rescuing teammates under pressure
+you enjoy claustrophobic horror with limited visibility

Not for you if...

−you want a relaxed pace and uninterrupted puzzle solving

What players say

82% of 2,510 reviews are positive · 87% of 31 in the last 30 days

Players praise the co-op play and pixel art. Recurring complaints describe non-host players losing character progression when saved sessions resume; players also ask for more maps and content.

Screenshots and trailer

Whisper Mountain Outbreak system requirements

Minimum: 1 GB VRAM, 4 GB RAM, 1 GB of disk space.

As published by the developer.

Can my PC run Whisper Mountain Outbreak?

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Minimum

OS: Windows 10 or later
Processor: 2.4 GHz or faster processor
Graphics: 1 GB VRAM, support Pixel Shader version 2.x or above
Memory: 4 GB RAM
Storage: 1 GB available space
DirectX: Version 10

Does Whisper Mountain Outbreak have co-op or multiplayer?

Yes: co-op online. It also has a single-player mode.

Does Whisper Mountain Outbreak run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Sometimes shows mouse, keyboard or non-Deck controller icons
Some text entry requires manually opening the on-screen keyboard
Some in-game text is small and may be hard to read
All functionality is accessible with the default controller configuration
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Steam features: Family Sharing
Languages: Text only: English, Indonesian, Simplified Chinese, Traditional Chinese, Japanese, French, German, Spanish - Spain, Korean, Polish, Portuguese - Brazil, Russian, Thai, Turkish.

Does Whisper Mountain Outbreak use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam