Think Pokémon, but every battle teaches you AI. Explore a pixel world and pick up real AI concepts, one duel at a time.
Free to play — Loss Valley is yours with no signup. Arrows/WASD to walk, Space to talk.
Seven scenes from across the full quest — only the first is free to play above.







No random battles. Every challenger tests something specific about how AI actually works, from loss functions to agents.
Loss Valley, Prompt Ridge, Constitution Coast, Agent Archipelago, and the Open Expanse — each with its own cast and curriculum.
Active beats passive — you'll remember more from a dozen duels than from a slide deck. Pixel art, tight pacing, a couple of hours end to end. No ads, no grind, no dark patterns.
You already own the full game — thanks for playing!
Enter the email you paid with and we'll unlock this browser.