How much will Portal Knights cost at launch on Nintendo Switch? July 12, 2020 18:35 Portal Knights will cost £24.99/$29.99/€29.99 at launch both digitally and physically. Related articles Does the Nintendo Switch edition of Portal Knights have online multiplayer? Can I play Portal Knights with a friend in split-screen mode on Nintendo Switch? How many friends can I play with? Can they come and go in the world? How does that work?