Kickstarter for Era of the Crusades - Historica Arcanum by Metis Media.

[Parmandur]

Thematically, I find it quite interesting and would certainly consider backing it, but sadly this seems to be 5e only.

I mean what else would they do...?

 

[schneeland]

I mean what else would they do...?

Business-wise I can perfectly understand their decision - the money is in the 5e space.
Personally, I would prefer a version with OSR/OSE stats, though (or even better, something Year Zero-compatible, but based on the realities of the market, that's not something I would actually expect to see, while 5e+OSR at least seems to happen once in a while).