Of course, the sensible thing would be to use an existing game engine, but after a certain point, there is some curiosity if learning and fighting yet another game engine is really quicker that just writing something from scratch.
[PBR Metalness]
Textured in Substance Painter, Knald & Photoshop.
Modeled in Zbrush, Maya & 3D Coat.
High Res Images - https://www.artstation.com/artwork/ezYqX
Low Poly model based off Baldi Konijn concept: https://www.artstation.com/artwork/DlrO
HQ Image + Sketchfab Link
https://www.artstation.com/artwork/JD2Zn