Frequency 1550 is a mobile city game that uses GPS and UMTS technology to let pupils of the secondary schools  actively learn about history instead of passively absorb knowledge.

The aim of Frequency 1550 is to bring the middle ages alive for pupils, within their history lessons.

In 2008, the mobile history games received a SpinAward in the category best gaming concept. 

In the beginning of 2005 Frequency 1550 was played for the first time. The reactions were overwhelmingly positive, as well within Waag Society as with the participating schools.

It was decided to play Frequency 1550 again in 2006/2007. The strong and weak points of this first pilot will be evaluated, so that the game was played again in an enhanced edition with 10 Amsterdam school classes.

Also research was done to measure the effects of 'gaming' on learning by the University Utrecht and the University of Amsterdam. From this research one of the results was that pupils that played the mobile game scored significantly higher on a knowledge test then pupils who had the same material in a traditional lesson.

In the summer of 2007 we could therefore again see groups of schoolchildren with their mobile phones in the city, sending their media to the 'Head Quarter', follow directions given and trying to solve puzzles and coping with difficult assignments.

This was a project in cooperation with Montessori Scholengemeenschap Amsterdam, Open Schoolgemeenschap Bijlmer, the IVLOS (UU), de ILO (UvA) and KPN.

Partly financed by Kennisrotonde (Kennisnet ICT on Schools) and the Mondriaan Foundation.

The content of Frequency 1550 has become part of Games Atelier at the end of 2009.