Novena Diabolos

Occult mystery visual novel about finding one human among demons

H5DEV Games · Published by Giiku Games · Released Nov 18, 2021

As of Oct 28, 2026: -70% right now, $4.79

Reviews: Very Positive; 96% of 54
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Untested
Last update on Steam: 4 years ago; Nov 25, 2021
Minimum PC: 4 GB RAM · 3 GB disk; Full requirements

What is Novena Diabolos?

You play a reporter trapped in isolated Hope Hill Village in this horror mystery visual novel. Over nine days, you explore locations, investigate murders, and question five women to identify the lone human, earn her trust, and escape. Locations, clues, and the human's identity vary between playthroughs.

For you if...

+you enjoy branching stories about characters and their motives
+you like using collected evidence to rule out suspects

Not for you if...

−you prefer action-focused horror over reading and dialogue
−you want manual saves to revisit earlier decisions

What players say

96% of 54 reviews are positive

Players praise the character writing, artwork, and occult atmosphere. Some find later playthroughs repetitive and easier to solve; translation inconsistencies also draw complaints.

Screenshots and trailer

Novena Diabolos system requirements

Minimum: 4 GB RAM, 3 GB of disk space.

As published by the developer.

Can my PC run Novena Diabolos?

The published requirements do not name a graphics card we can compare.

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Minimum

Memory: 4 GB RAM
Storage: 3 GB available space

Does Novena Diabolos have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Novena Diabolos run on Steam Deck?

Untested Not yet tested by Valve on Steam Deck.

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS
Achievements: 39
Steam features: Family Sharing
Languages: Text only: English.

Does Novena Diabolos 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 28, 2026. How to filter AI games on Steam