Playfish unveils fifth Facebook game

The game tests players' geography knowledge through a series of quizes and challenges.

"Geo Challenge is designed for friends to compete and show off their knowledge of the planet," said head of Playfish Kristian Segerstrale said in a post on the company's blog.

"You travel the world together with our friendly tour guide and get to test your knowledge of countries, cities and flags in a collection of minigames. The game rewards speed as well as knowledge and accuracy and gives you a geography knowledge rating - or geo score - between Agoraphobe and Geography Guru with ratings like Bus Driver, Sailor and Airline Pilot in between. We’re still tweaking things and thinking of features to add, so all feedback is much appreciated."

The firm launched its game Pet Society just over a month ago for Facebook and the game already has 1.5m users, the firm says.

Its other titltes - Who Has the Biggest Brain?, Word Challenge and CasualGaming.biz favourite Bowling Buddies - have been permanent fixtures in the Facebook games top 10 for some time as well.