All (action)games I know of don’t have real and proper surface collision detection, except some physics games. Just an example: If my Char hits something or someone the weapon goes straight through without any physical reaction, it just counts the damage I’ve done. Are there any games out there, in which physics are calculated correctly and taken into visual account?!
Exanima is basically the prequel to the main game they are also currently working on (Sui Generis).
It’s also planned to have multiplayer after the story part is finished.