Under the title "2D and 3D accelerated graphics" on the linked website it shows gameplay for Darksburg (top-left) and Northgard (both on the middle row). I've played both of these games for a decent amount of time (~150 hours between both) and can attest to how fun I found them. Darksburg suffers from lack of content but as functional games (no bugs etc) it was a pleasant experience. So it appears Shiro Games use it!
Re: Heaps: A free, open-source and cross-platform game engine
#101One of Shiro Games founder (Nicolas Cannasse) is the creator of the Haxe language and Heaps engine !