Developed by Frankfurt, Germany's Keen Games, the 3D sandbox RPG features randomly generated worlds, crafting, 3 player classes, and a "lightweight levelling system" 505 Games says allows "unique role-playing," letting players vary their goals and play-style.
http://www.ign.com/articles/2016/02/04/505-games-announces-sandbox-3d-rpg-portal-knights
http://www.ign.com/articles/2016/02/04/505-games-announces-sandbox-3d-rpg-portal-knights