Good Old Games put up a special promo for up to 70% off the entire Nordic Games catalogue. The sale is because Nordic Games recently bought JoWood Studios and GOG was able to sign a deal with the new owners.
To get 70% off you have to buy all 15 games that are on sale or complete the bundle. Otherwise you will save 50% off each game. First price is 70% off. Second price is 50% off.