Paul Preece, the designer of the wildly addictive Desktop Tower Defense has quit his day job and is teaming up with David Litsky; the designer of FlashElementTD to develop online games full time.

Desktop Tower Defense currently ranks at just over 6,000 on Alexa. According to a report at Gigaom the game had 4 million unique visitors on 20 million page views in April.

Michael Arrington has written previously about the addictive nature of the simple yet compelling game. It has spurred competitions, hacks and a large loyal following.

Preece and Litsky have set up a blog to document the new company. At the time of writing the front page included a sneak peak at the new towers to be included in the next version of Desktop Tower Defense.

(via Kottke)