The Curse of Zigoris is good game if you like platformer games. This game has very bad gamepad button bound and you can not map them so your gameplay is seriously affected. It sometimes also not unlock achievement of stage despite of you have already completed it. I have faced this problem for stage two achievement and I have to backup my save game first and have to start new game to got this achievement. So I have do some research and found this game is made in "Multimedia fusion studio" which contain only single exe file and it does not require steam to play it. You can play game directly run exe file without open steam so I think if it sometime missed communication with steam then your achievement can not be unlocked. Overall hard and fun platformer game if you don't mind horrible controller mapping.