What is "pacmania"

PacMania is a series of computer games developed and published by Alawar Entertainment, based on the Pac-Man series. All games are a try before you buy model, usually a 60 minute trial. To buy the full version (of the latest game, PacMania III), you have to pay £4.61 in the UK, or $6.99 in the US, although anyone in the world can buy it.