One violet light over the whole city. Pick a mission, spend a couple of minutes on the page, type in your own code.
Free to join. No card.
No machinery to learn. Each mission is a short visit and one thing to spot.

Each one names a site and one thing to find there.

Spend a couple of minutes on the page and your code appears.

Every payment is an on-chain transaction you can open.
Out here nothing hides. Every reward PolHunter pays is a transaction on Polygon that anyone can look up.