> What single player / local multiplayer games on GOG have DRM?
#1. This question is not asked in good faith; games purposefully include centralized internet multiplayer, while not including local multiplayer, and this is itself a form of DRM.
#2. Northgard applies DRM even to single-player modes. You cannot use them without simultaneously connecting through the Steam^W GOG client.
So no, offline singleplayer is not working fine by all accounts, it is not intended to work at all, and this was fine with GOG when they reviewed the game. (If you start the game, you will see the message "You need to log in through GOG to access Conquest" displayed in a tooltip over its grayed-out button. It's not something you could actually miss, if you were reviewing the game.)
#1. This question is not asked in good faith; games purposefully include centralized internet multiplayer, while not including local multiplayer, and this is itself a form of DRM.
#2. Northgard applies DRM even to single-player modes. You cannot use them without simultaneously connecting through the Steam^W GOG client.
https://www.gog.com/game/northgard