Euro games, ameritrash, train games, miniatures - anything you can play by laying down cards or moving bits around on a board

D&D, Star Wars, GURPS, Cthulu, LARPs, vampires, hackers, old and new

Magic the Gathering, Pokemon, Hearthstone - and their many spin-offs

PC games, video games, mobile games, game sites, game platforms, VR games, augmented reality games, etc

Little-known high-intensity game niche

Hex-and-counter games, card-driven games, chit-pull systems, VASSAL, all the stuff that would warm a grognard's heart