The Demon King: Harem

Adult fantasy RPG combining turn-based battles, relationships, and city rebuilding

KAWAGUCHI · Released Jul 23, 2026

Reviews: Very Positive; 84% of 70
Recent reviews: Not enough recent
Players: 8; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 3 months ago; Jul 25, 2026
Minimum PC: Any; 2 GB RAM · 2 GB disk; Full requirements

What is The Demon King: Harem?

This single-player RPG casts you as someone transported into the Demon King's body, helping goblins resist a human empire's invasion. You follow multiple character storylines and restore buildings that generate tax income, unlock outfits, and provide ways to invite characters to your room.

For you if...

+you prefer short, straightforward adventures about an overwhelmingly powerful protagonist

Not for you if...

−you want branching stories shaped by your decisions

What players say

84% of 70 reviews are positive

Players praise the character artwork and animated sex scenes. Some describe the RPG systems as bare-bones.

Screenshots and trailer

The Demon King: Harem system requirements

Minimum: Any, 2 GB RAM, 2 GB of disk space.

As published by the developer.

Can my PC run The Demon King: Harem?

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Minimum

OS: Windows 10
Processor: i3
Graphics: Any
Memory: 2 GB RAM
Storage: 2 GB available space

Does The Demon King: Harem have co-op or multiplayer?

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

Single-player

Does The Demon King: Harem run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Steam features: Cloud saves, Family Sharing
Languages: Text only: English, Japanese, Simplified Chinese, Traditional Chinese.

Does The Demon King: Harem 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