The single-player looks interesting. Multiplayer needs GOG Galaxy and requires a central server. This is not evident from the store page, which states "Multi-player" and "DRM FREE. No activation or online connection required to play." When not running with GOG Galaxy, "Join Game" and other multiplayer buttons are disabled / greyed-out. There wasn't any option to connect to other games on the LAN by IP address (even when run with GOG Galaxy). So I'm not going to be able to play this one with my children then.
