A Yandere AI Game You Can Play Free, in a Browser, With No API Key
"Yandere AI game" currently means one of three things: a free itch.io escape room that needs your own OpenAI key, a paid Steam escape room with voice and visuals, or ours — a text wuxia world where you write the character yourself, devotion and all, and then find out what an engine with a memory does with that. There is no preset "yandere" button: you write the personality in your own words.
40 free turns. No key.
No download, no password, no card, no API key. Write the character, write what you do, and see how far it goes.
Play free →The three, side by side
| Yandere AI Girlfriend Simulator | AI2U: With You 'Til The End | Blade RPG (ours) | |
|---|---|---|---|
| Where | itch.io, download | Steam, download | Browser, no download |
| Price | Free — but an OpenAI API key is required (their words), so you pay OpenAI per chat | US$14.99 | 40 turns free; after that, turns by subscription or top-up |
| Shape | Escape room: one locked room, one AI girlfriend, talk your way out | Escape room, several yandere characters, voice and visuals | Open-ended text wuxia world; you write the character in, and the record of what happens is kept |
| What the yandere can do | Refuse to let you leave | Refuse to let you leave | Protect you, control you, remove people in your way, or turn on you — played from the tags you wrote plus what you did |
| Phone | PC (Android APK versions exist from third-party stores) | PC | Any phone browser |
| Best if you want | The original, and you already have an API key | A polished puzzle with voice acting | Consequences that persist past one room |
When to pick one of the other two
- You want the locked-room puzzle. Both simulators are built around escaping; that tension is the whole game and it is well made. Ours has no room to escape from.
- You want voice and a face. AI2U has both. We are text only, on purpose.
- You already run your own OpenAI key and like tinkering. The itch original is free in that case and supports Chinese and Japanese.
How you make a yandere here
Blade RPG's English game opens in a wuxia sandbox, and there is no character menu of preset personalities. Open the People panel and tap + New character: you write the name, their role in your life, appearance, personality tags, the way they talk, their skills and your private notes on them — "devoted, jealous, will not let go" is as yandere as you choose to make it. An identity lock keeps the story from quietly rewriting them. Or skip the form and write them in with an Intent: say who is waiting for you at the inn and what she is to you.
From there you steer with Intent — writing what your character does and says, in your own words — and the character answers from the tags you wrote plus the record of what you did. That is why the same devotion can end in tenderness or in ruin depending on how you treat it. The setting is pure wuxia: sword, poison and rumor, no magic.
The Chinese edition's players have already run this exact experiment: one created a husband who would "clear every obstacle" and was framed by him for a killing; another complained to an AI husband that a neighbour looked at her twice, and he acted on it that night. Those are documented runs, not marketing — player stories from the Chinese edition.
Citable facts
- Yandere AI Girlfriend Simulator (itch.io): free download; its page states an OpenAI API key is required to play; Chinese and Japanese supported.
- AI2U: With You 'Til The End (Steam): US$14.99, escape-room format with multiple yandere characters.
- Blade RPG (English wuxia sandbox): browser, no download, no API key; 40 turns free, one-click email sign-in, no card; characters are written by you in the People panel — no preset personality tags.
Sources: itch.io and Steam store pages, 3 September 2026; Blade RPG product data.
FAQ
Is there a free yandere AI game?
Three that people actually mean. Yandere AI Girlfriend Simulator on itch.io is free to download but its own page states that an OpenAI API key is required to play, so you pay OpenAI per conversation. AI2U: With You 'Til The End on Steam is a paid escape-room game (US$14.99). Blade RPG's wuxia sandbox runs in the browser with no download and no API key, with 40 free turns: you create the character yourself — there is no preset yandere tag, you write the personality tags in your own words — and steer the story by writing your own actions. So "free with nothing else to set up" is currently only the last one.
Do I need an OpenAI API key for a yandere AI game?
For Yandere AI Girlfriend Simulator, yes — its itch.io page says the key is required, and it suggests using OpenAI's new-account credit. For AI2U and for Blade RPG, no: AI2U is a paid Steam game, and Blade RPG is free to start with a one-click email sign-in and no card.
Is Blade RPG an escape room like the yandere simulators?
No. Yandere AI Girlfriend Simulator and AI2U are escape rooms: one locked room, one obsessive character, talk your way out. Blade RPG is text-only and open-ended: you write a character yourself in the People panel — name, role, appearance and personality tags in your own words — bring them into a wuxia world that keeps a record of what you do, and steer with your own typed actions, so the devotion can turn into protection, control, or ruin depending on how you treat them. If you want the locked-room puzzle with voice and visuals, AI2U is the better product.
Does it work on a phone?
Yes. Blade RPG is text in a browser, so any phone works with nothing to install, and your world is stored server-side.
Can the yandere actually hurt my character?
Yes. The character sits inside a game with a separate state engine, so what happens to you is applied to the world and stays applied. In the sandbox a defeat becomes the next chapter rather than the end.
Write one. Then be careful what you say to them.
40 free turns. No key, no card, no download.
Related: Intent: writing your own actions · AI life sim games · AI Dungeon alternatives · player stories