Become a soldier in my army!
http://www.kingsofchaos.com/page.php?id=44344
All you have to do is click the link and registrer an account.
The site might be very slow around peak hours.
This is a text based online game, that gives you something to do for 5-10 mins every hour.
Perfect if your team mates go afk and you have already been to the bathroom, fetched a drink, watched your favourite movie and saved the world.
**No downloading required**