I'm not a fan of fantasy. The concept of magic always seemed like laziness to me. This game cannot be any further than that even if it tried. I can only remember two other games in which I had such an epic experience, and those are Bungie's Marathon trilogy and Valve's Half Life 2. Twisting walkways. Maze-like corridors. Sprawling levels. And secrets so well hidden that your chances of finding some of them are next to nothing. Every weapon feels unique enough that some of them I highly doubt I'll find anything like in any other game ever. There's a lightning gun that can overload enemies if you focus on one until it explodes, sending out arcs of lightning killing several nearby enemies. And then there's the one that shoots PLANETS. The power-up mechanic in this game is called Soul Mode, which does more than just double the damage you do; it changes the weapons so that they fire differently. That planet-shooter I talked about earlier? In Soul Mode, it shoots STARS. There is one boss fight for each set of levels. On Hard difficulty, these bosses pose a significant enough challenge that i dies to each of them at least a couple times, but I never felt that they were bullshit level difficult. GOG's review character limit sadly prevents me writing about the variety of enemies. There's much to say about them. There's so much in this game, and every set of levels is so unique, that I haven't even gotten through half of it yet and I already feel like I've played several different games . It's a $20 package that gets you an amount of content that can easily span 3 or more whole $60 games according to the standards of this decade's AAA games industry - I feel like I bought an entire franchise of games for a massive discount. The only thing I can fault this game for is being so good that I do not want to play any other game or even go back to real life ever again. It's perfect in my book. Also, if you don't play this game on Hard mode, you're doing it wrong.