Apparently it’s still being sold (https://www.gog.com/game/outlaws_a_handful_of_missions), so I can’t really distribute it legally, sorry!

However, anyone that has purchased the game can package it as a AppImage for personal use. Looks like it’s a Windows-only game, so the way to go would be to create an AppImage with a portable Wine setup and an installation of the game. You can find more info here: https://github.com/RazZziel/PortableLinuxGames/wiki/Creating-appimages-from-windows-applications