This game is still in active development and available to the public for purchase in it's unfinished state, either in Early-Alpha or Beta (or any status in between).
Principia:Master of Science is a simulation game with the theme of European science in 17th century. Player will choose one of real scientists in those era like Isaac Newton and proceed on the research. It's the time even the word "Science" didn't exist. Who can be the master of science?