Fun fact. Ultima 7 was one of the few commercial titles ever made that used "Unreal" mode.

https://en.wikipedia.org/wiki/Unreal_mode

It wasn't particularly popular as it couldn't play nice with protected mode environments.

Other than Ultima 7 I only know of Zone66 as another game that used Unreal mode. Early versions also didn't like v86 mode but later versions added support for DPMI or in some other way started to play nicely with EMM386