Tailed Demon Slayer is an action-packed idle RPG where you play as a brave fox hero fighting to reclaim the land of Bestia from an undead army led by the tyrannical King Lich. Explore dungeons, unlock powerful skills across multiple weapon types, collect unique gear, train fairies, and grow stronger every day — even while you are away.

This free online game runs in your browser on PLRun with no download required. Tailed Demon Slayer is an idle action RPG developed by NSTAGE and published by CookApps, a South Korean studio known for Shadow Knights and AFK Dungeon.

Originally released on mobile in October 2021 and brought to browsers as an HTML5 (Unity WebGL) title in April 2025, the game has earned a 9.2/10 rating from over 2,000 votes on CrazyGames and a 4.4 on Google Play. You play as a fox warrior battling waves of demons across hundreds of stages, with a boss fight every 10 waves.

The game blends real-time hack-and-slash combat with deep idle mechanics — your hero fights and earns resources even when you are offline. With four weapon types, a fairy companion system, guardian summons, costume upgrades, rogue-like dungeons, and a meditation minigame, this browser game delivers enormous depth wrapped in charming 2D anime-style visuals. Your fox hero automatically fights waves of demons.

Your job is to manage upgrades, time powerful abilities, and push through progressively harder stages. Tailed Demon Slayer uses simple click/tap controls: No keyboard controls are needed. The game is fully playable with one-handed mouse or touch input. The game is divided into numbered stages. Each stage sends waves of demon enemies at your hero.