The Scarlet Demonslayer

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The Scarlet Demonslayer is a fantasy RPG you can play instantly in your browser on PC and mobile. Agnis Flarebyte is the kingdom’s strongest Demon Annihilator, the warrior everyone relies on when dimensional rifts unleash monsters. Then a corrupt Prime Minister steals her magic and tries to use it to control her. With the rifts still spreading, Agnis needs another way to gather power and save the land.

That solution comes through a succubus-like ability that lets her sense people’s desires and turn lust into magic. Speak with people, choose scenes to pursue, and spend the energy you earn to grow stronger. Agnis is what makes the journey memorable: she knows what’s happening to her, makes her own decisions, and never loses her commanding personality.

The character art and adult CGs give her story plenty of appeal, though repeated scenes and simple tasks can wear thin when you’re raising stats. There are no animated sex scenes, and some players have reported bugs. If you want a corruption RPG led by a heroine who stays firmly in charge, Agnis is well worth meeting.

Press Play and start directly in your browser with no separate installation.

About the Developer: Created by Nuko Majin - support the developer for more work.

Game Info: RPG Maker | by Nuko Majin | Fantasy RPG / Female Protagonist / Corruption | English.

Updated to 1.04 on May 29th 2026.