Planned Release Date: May 2026

About This Game

Rebuild a dead techno-gothic empire in this dark idle clicker.

You are the last sovereign of the Hollow Crown, awakening in the ruins of a once-great empire. Summon ritual servitors, fire up the hematic pumps, and channel Blood Fuel through the shattered circuit. Decode Grave Data from ancient crypt archives, issue Royal Decrees for power surges, and ascend the throne to earn permanent Crown Sigils that carry across every run.

KEY FEATURES:

— Dark Fantasy Idle/Clicker: Click the reactor in the Dungeon to damage twisted foes and harvest Blood Fuel, or let your 6 generator types produce resources passively.

— 12 Upgrades & 12 Research Techs: Enhance your reactor, industrial base, and forbidden archives through a branching progression tree across Reactor, Industry, and Archive categories.

— 4 Royal Decrees: Issue timed commands for massive production surges — Extraction, Tribute, Silence, and Dominion — each with unique effects and cooldowns.

— Prestige Ascension: Reset your empire to gain Crown Sigils and unlock 7 permanent sigil upgrades that persist across every reign.

— Random Puzzles: Decode ancient ciphers, match rune pairs, and complete rune sequences for bonus rewards — but fail and suffer dark curses that weaken your circuit.

— Curse System: 6 different punishments drain your strength when puzzles fail — Weakened Strikes, Rusted Gears, Blood Drain, Empowered Foes, and more.

— Atmospheric Soundtrack: Three haunting dark ambient tracks with crossfade, plus pitch-shifted combat SFX.

— 20+ Steam Achievements: Track your progression from First Pulse to Hollow Sovereign.

— Steam Cloud Saves: Continue your reign across devices.

Can you rebuild the Hollow Circuit and claim the throne eternal?

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Visual artwork in King of the Hollow Circuit — including environment backgrounds and enemy/boss illustrations — was created using generative AI tools. Music, sound effects, gameplay code, narrative and UI text, achievement and item names, and store page copy were produced without generative AI.

Mature Content Description

The developers describe the content like this:

King of the Hollow Circuit is an idle/incremental clicker game with a techno-gothic aesthetic. Its mature content is purely thematic and stylistic — there is no graphic violence, gore, sexual content, or depiction of sensitive topics anywhere in the game.

Thematic content present in the game:

Dark fantasy / gothic horror imagery — The game's resources, generators, and progression are themed around blood ("Blood Fuel"), death and decay ("Grave Data," "Crypt Archives," "Mourning Terminals"), and occult ritual iconography (sigils, decrees, "Hollow Crown," cathedral imagery). All of this is presented as numerical counters, stylized industrial illustrations, and atmospheric flavor text — not as on-screen violence or harm to characters.
Implied violence in flavor text — Some upgrade names reference "ritual blades," "blood resonance," and similar imagery. These are written descriptions only; no acts of violence are depicted visually.
Bleak/oppressive atmosphere — Color palette, music, and tone evoke a "dead empire" being rebuilt; references to entombment, mourning, and decay.
Sensitivity topics — NOT present in the game:

No sexual content, nudity, or sexual references
No sexual assault or non-consensual content
No BDSM
No drug or alcohol use, depiction, or abuse
No self-harm or suicide content
No real-world religious commentary, hate, or discriminatory content
Gameplay: The game is a clicker/idle hybrid. Players accumulate abstract resources by clicking and purchasing generators. There is no combat depicted, no characters in distress shown, and no graphic visuals — the dark themes are conveyed entirely through naming, color, and ambient music.