Personally, I thought chapters three and four, while a bit inferior to one and two, were also pretty great, because not only are they mostly full of challenging fights (especially chapter three), but I think the combat system in Risen is the best ARPG combat system ever made, it’s even better than the one in Gothics, mostly thanks to the added variety of special moves, not to mention that the end-game dungeons are also pretty interestingly designed – you’ll have to constantly observe your surroundings, because they’re full of lethal traps, so if you get careless, you’ll be smashed by crushers, impaled by spike traps, burned alive by incinerators and dropped in the middle of enemy mobs by trapdoors. Some areas even have additional assholery in the form of anti-magic crystals around the walls, which doesn’t allow the use of any magic.
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The only thing that’s absolutely fucking horrible with chapter four, is the very end, and by very end, I mean the boss fight, which is basically one giant, anticlimactic, uninspired and dull minigame. I’d say it’s right up there with System Shock 2’s end-game ‘Nah’.​