Imaginary Numbers, an independent development studio based in Sydney, Australia, today announced the development of Tactica Online, a turn-based strategy RPG set in the conspiracy and intrigue of Leonardo da Vinci's world. Focusing on tactical squad combat, the game promises a deep storyline featuring secret societies and the struggle between magic and science. Combat takes place in missions or through Tournaments and Campaigns that affect the central storyline. Players control a team of characters with skills and abilities of their own design. Tactica Online is expected to be available worldwide in Fall 2005 - press 'read more' for details and first screenshots.