Not only the screenshots are similar - Nyrthos draws a lot of influence from the Diablo and Gothic series. Killing monsters, leveling, learning new skills/abilities and looting is indeed the core of the game.
The game borrows the mechanics from other genres, and tries to make them work in its world. You will be able to build certain structures and manage resources and do other stuff quite uncommon in RPGs.
The game features a day/night/weather cycle that strongly impacts the game world; simply put, the night is very dark and deadly, so many actions have to be performed during the day. The cycle influences enemies, spawnable items and resources, events and other stuff.
http://www.nyrthos.com/index.html