SlackBuildsOrg/games/exult

Ultima 7, an RPG from the early 1990's, still has a huge
following. But, being a DOS game with a very nonstandard memory
manager, it is difficult to run it on the latest computers. Exult
is a project to create an Ultima 7 game engine that runs on modern
operating systems, capable of using the data and graphics files that
come with the game.

Exult aims to let those people who own Ultima 7 (copyright 1993)
play the game on modern hardware, in as close to (or perhaps even
surpassing) its original splendor as is possible. You need to own
"Ultima 7: The Black Gate" and/or "Ultima 7: Serpent Isle" and
optionally the add-ons (not required to run) in order to use Exult,
and we encourage you to buy a legal copy.

exult_audio.zip is only needed for using digital audio with exult,
it can be skipped if digital audio is not wanted.

SDL2 is an optional dependency.