Solve puzzles and raise money for Cancer Research UK...

operationsleepercell.com — Operation Sleeper Cell is the world's first massively multiplayer game designed to raise money for charity. It involves a "grid" of puzzles of varying difficulty. Players can solve on their own or in teams, and they can donate money to unlock further puzzle cells -- and get a head start on solving them. Sep 30, 2008 View in Crawl 4