Please check this interview with Lewis Nicolle who created his own game engine with D language for his new game Art of Reflection [1],[2].

[1] Why D Programming Language?

https://www.youtube.com/watch?v=teWQbYvPBTg

[2] Art of Reflection:

https://store.steampowered.com/app/2290770/The_Art_of_Reflec...