# Show HN: A TypeScript Pokémon Crystal TUI for Agent Benchmarking

> Source: <https://github.com/TheCulliganMan/crystal-llm/>
> Published: 2026-06-21 16:23:14+00:00

Terminal and native desktop Pokemon Crystal runtime for live play and LLM gameplay experiments.

Install once:

```
npm install
```

Start the TUI:

```
npm run start:tui
```

Start the native desktop app:

```
npm run start:desktop
```

- Move: arrow keys,
`WASD`

, or`HJKL`

- A:
`Z`

,`J`

, or Space - B:
`X`

,`K`

- Start: Enter
- Select: Tab
- Quit the TUI:
`:q!`

- Use Node.js
`24.x`

and npm`10.5+`

. `npm run tui`

and`npm run desktop`

are shorter aliases.- On first run, the start command fetches the upstream
`pret/pokecrystal`

sources and exports core runtime data only when local assets are missing. - To require preexisting local assets and skip that bootstrap, run with
`POKECRYSTAL_BOOTSTRAP_ASSETS=0`

. - TUI audio uses PCM;
`ffmpeg`

and MP3 audio export are not required to start the game.