I would take Ankh-Morpork for a week, just for the experience. And the smell. Like London!
Regarding the steam deck you’re in luck. There’s a few topics around about people who have them, or want to get one, and are happy to share their experiences (myself included):
ScummVM will run the first two fine, Noir is a problem but if you hunt around enough to find the right image you can play it no problems at all!