Web Riddler

[Step Murt]

This forum-based riddle has 100 phases with hidden levels, hidden forums, etc.
Happy solving!

http://webriddler.9.forumer.com/

WARNING:
USE SPOILER TAGS TO GIVE HINTS.
DO NOT GIVE SOLUTIONS, POST FULL QUESTIONS, OR GIVE A LINK TO ANY PART OF THE GAME.

THIS IS HOW YOU MAKE SPOILERS
[spoiler=Title Here]Enter text here...[/spoiler]