Terms of Use

Last updated: 23 October 2026

The site

echo2201.com is the companion site of the puzzle book ECHO, run by George Kostakis and Paris Perakis. Contact: echo@echo2201.com. By using the site you accept these terms.

The decoder

The decoder is free. It checks the answers to the puzzles in the book and opens the next Echo. The book is complete without it: both endings are printed inside. We aim to keep the decoder online for many years but cannot promise it will always be available or free of errors.

The Archive

The Archive passphrase is sent to backers of the related Kickstarter rewards. It is for personal use. Please do not publish it or its contents.

Our content

The stories, puzzles, illustrations, texts and design of ECHO and of this site are protected by copyright. You may play, share links and post your own photos of the book. You may not copy, publish or sell the puzzles, answers or texts without our written permission.

Spoilers

Please keep answers out of public reviews and posts, so other readers can find them on their own.

Kickstarter

Pledges, rewards, payments and refunds for the campaign are handled on Kickstarter under Kickstarter's own terms.

Liability

The site is provided as it is. As far as the law allows, we are not liable for damage caused by its use or by a temporary outage.

Law

These terms are governed by Greek law. Courts of Athens have jurisdiction.