Great catch! The Wikipedia article for MonoGame lists Hades, but is evidently wrong. Hades used The Forge for graphics. Ctrl/Cmd-F "Hades" on the Github page has some info:

https://github.com/ConfettiFX/The-Forge

The Forge is graphics only; audio, input, etc., have to be handled by something else and Hades used a custom C++ engine apparently.