Yup, it’s not in the specs that it supports intel graphics.
These days it’s expected that any directX/Vulkan supporting card can run just about anything with varying levels of performance, back in the day it was very very specific what a 3d game engine supported. If your card wasn’t on the list it wasn’t going to run outside of software mode unless the newer version of that card had backwards compatibility features. Also later on you had to worry about very specific shader features and direct x features being supported to even get the game to look right.
Just a bit interesting how times change. They definitely should have worked with intel a bit to get it to work, at least given them a copy with some time for them to work out their drivers to support it.