then consider Fallout 1 & 2 made by Obsidian, the founding fathers of the Fallout universe. You should be able to run these on DOS Box. Also Atom which is a well designed, Russian themed version of Fallout that you can get on Steam. Both of these games are from old school late 1990s isometric perspective. And so closest thing to old skool pen n paper D&DI play on PC. AAA games are not a big thing for me. I'm an old, old school wargamer and pen-and-paper RPG player. Single player, offline games are my preference. Turn-based, not RTS.
And, macaroni and cheese.
ps also believe you can downlad TES I Arena and TES II Daggerfall for free off the TES USEP Wiki site. This is the oldest TES fansite on the web and so is the most comprehensive fan site regarding game and franchise lore to date