Does Portal Knights require an internet connection to play? July 12, 2020 18:50 No, Portal Knights does not require an internet connection to play once all the files are downloaded from the store. Related articles I already own Terraria. Why am I being asked to repurchase it on the Google Play store? What can I do about lag and disconnects while playing multiplayer games over Wi-Fi? Does Portal Knights require an internet connection to play on Nintendo Switch? Where are my saves stored?