The game is challenging (dark souls inspired) but never unfair. Even when a single anemy attack wipes out 80% of your life you have enought time bevore the next attack to drink a portion. Some decision making, puzzeling and finding/opening short cuts. Game crashes happened about every 10h. For a game were you die a lot it would be OK but, there was one boss enemy, after about 75% of the game, were crashes occoured every 2 minutes. I think this was caused by sparkle animation. This nearly broke the game (minus one star). I managed after fiddeling with the graphics and avoid looking at the boss. (Aim ,shoot, run in circles, repeat). As I found out this problem can differ from system to system and occour at different places, so keep this in mind when buying the game.
This Dungeon crawler doesn't have a deep story or puzzle elements but the contineous introduction of new type of monsters and different ways of killing them best keeps the game challenging. At least for the first 5 houres. I recognized no bugs, glitches or crashes so far. A minus for me is, that the hero can't walk beside the path.