[BariumBlue]

What's the subset of games that A) can be played offline, and B) aren't already single player with no microtransactions?

Free mobile games paid by ads?

[soulofmischief]

Fighting games come to mind as an immediate example. Often DLC in lieu of microtransactions.

[tmtvl]

Hot seat multiplayer games?

[Tepix]

Board games, card games.