Go with Heroic Games launcher. It works pretty simply without fuss for gog games in my experience.

I remember watching a House Party play through with the Game Grumps dudes Dan Avidan and Arin Hanson. They played through until they found themselves in the game. So that may be the only one I actually play. Postal 2 also might be worth playing by the looks of it

I heard being a dik and treasure of Nadia are good, but havent played them myself. House party is actually fun. The rest i am not sure. Yes, I am a degenerate

from what i have seen, many of the games are done in renpy. usually these ship something like run.py - should be easy enough, if you have python installed.

Hunie Pop is a fantastic game.

Best way to run them on Linux I think would be heroic launcher