Following a digital re-release of the original series of games, Age of Wonders III was later announced on February 6, 2013. Development first began in 2010, with many of the original developers of the previous games having returned, with development being led by studio founders Lennart Sas and Arno van Wingerden, while technical producer Djurre van Dijk and game designer Arnout Sas also returned. Ray Bingham is the story writer. Jimmy van der Have has been the chief liaison between the development team and the fan community on the official website, with further development also involving the use of regular journals and solicits feedback on the developer game site’s official forum, allowing the community to be involved in the testing of the game. While a random map generator has been promised, additional tools for extensive, user-created content are available.
In February 2013, Markus “Notch” Persson, owner of Mojang and founding lead designer of the popular game Minecraft, was revealed as an investment partner in the development of Age of Wonders III. Triumph Studios got into contact with Mojang following the mention of their series with the random blurb for the title screen of Minecraft, leading them to show a demo of the current development stage at the time, including with other potential publishers. Lennart Sas at Triumph stated that “His biggest concern was that it would cost him a lot of time, so it helped that we made this sort of game before and were at an advanced stage of development.” This eventually allowed the studio to opt to self-publish following further funding, being an unconventional approach to funding and publishing, without the use of Kickstarter like many sequels to other classic pc titles in development during that period. Persson himself is a fan of the previous Age of Wonders games and instead went on to help simply fund the development of III rather than having any publishing rights or ownership. His involvement would later be referenced within the game in the form of a recruitable hero called “Per Notchson” that resembles Persson.