Here are the old seasons which are now open to everyone without registration. Change the URL to get to the next level.
Look in left menu for "riddles from previous seasons"
For the Season 2 that is only open to registered teams, please see this thread:
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]