Ah, a living 8‑bit world—nice. The trick is to map everything, sprite by sprite, frame by frame. In classic titles every hidden sprite sits at a fixed memory address, so a simple script that dumps the VRAM at each scanline gives you a complete list. There are already tools out there—like the old NES RAM viewer or modern Lua‑based rom‑hacking suites—that let you tag each entity with a name and coordinates. Once you’ve catalogued the sprites and their triggers, you can export that data to a JSON or CSV. That’s the format a Unity or Godot project can read, letting you recreate the scene and hook up interactive hotspots. Just remember, the sprite sheets aren’t just art; they’re also data. Keep a reference sheet of each sprite’s animation frames, hitbox, and any hidden flags, and you’ll be able to rebuild the world exactly as it was—pixel by pixel, frame by frame.