Сам сразу не поверил. Пруф:
https://sonicworldfangame.com/faq/
Q. What is Sonic World DX made in?
A. Sonic World has been created using the Blitz-3D engine.
https://sonic-world-fangame.fandom.c...nic_World_Wiki
Sonic World, fangame created by World Team and is built with Blitz3D IDE, with raw DirectX7 Power and has true Sonic look and feel.
Ссылка на сайт игры:
https://sonicworldfangame.com/
И похоже, это самая лучшая игра по графике на Blitz3d.