YMMV / Arx Fatalis

• Demonic Spiders:
  • The Ylsides. They are extremely fast and can take off 20% of your health or more with one hit. Their only real weakness is magic, and if you haven't invested enough in that (or have no equipment to make up the deficient) fighting them can become borderline Unwinnable unless you exploit Good Bad Bugs.
  • Liches, due to their high health pool, predilection for paralyze spells, and summoning of zombies.
• Fridge Brilliance: The cloud of space dust and asteroids which obscured the sun of Arx should be the remains of Akbaa's home-world which he destroyed. Akbaa's meteor is just one of myriad particles in those clouds.
• Game-Breaker: The Bless spell boosts caster's all stats (on x+1, where x is his level, and since skills depend on stats, they, too, increase) roughly for twenty seconds. Certainly enough time to pull on some heavy armor or powerful weapon (and it won't fall off when the spell effect goes out), see some well-hidden door, pick some complicated lock or cast some top level spell.
• Goddamned Bats. These pesky rodents are everywhere (seriously, there are only a couple of locations without them), make extremely annoying squeaks when they notice you, are small and able to dodge your attacks, and so are hard to hit with any non-BFS weapon. Thankfully, they only deal Scratch Damage. Why the hell did the Black Beast not eat you in the dwarven mines, you little bastards?
• Good Bad Bugs:
  • Some of the players experience a rather unusual bug where the protagonist's movement speed appears to depend on the frame-rate, which is not capped. On top of that, speed is the only thing affected in this manner. This makes fighting in narrow tunnels (and navigating them, which is one of the larger parts of the gameplay) less tedious than it generally is, although players with high-end rigs complain that sometimes they come close to breaking the sound barrier.
  • You can pickpocket anything that can be pickpocketed if you just have the bare minimum stealth skill for it. If you try to pickpocket someone and they notice it, you are given a warning and have a couple of seconds to close the pickpocketing interface before the NPC turns hostile. However, the AI only cares about how long you keep it open, not whether you actually steal something. If you are quick about it, you can grab an item in the grace period.
• Nightmare Fuel:
  • Especially the Black Beast. Imagine a thing that resembles a hideous hybrid between a rat, a cat and a dog, size of a tiger, with nearly foot-long claws that can cut rock, snake-like head, solid white eyes and a gaping maw filled with needle-like teeth which form a gruesome "smile" when the creature is about to attack. Your weapons cannot hurt it at all, and it can kill you in one swipe. It can run very fast, but does not because it knows you will not escape, so it follows you, slowly, with echoing steps, through the tunnels of a dwarven village (covered by guts and blood of the population which the beast devoured), blocking tunnels with its bulk (so you can't avoid it if it catches you), busting every door you close and tearing through the walls sometimes, completely unstoppable. At one point, you have to go into the dead end, search the mutilated dwarven corpse for the key and return ASAP, while you hear Black Beast is near the door you need to open; if you linger, it goes for you, cutting you from the door, and you turn a corner and bump into it directly face-to-mouth (and jump in your chair), and now you have two options: dying here or running back and dying there ten seconds later.
  • Deep down on the seventh level, you find the Mushroom Forest, inhabited by the Ratmen. Annoying as they are, given how they can teleport away from danger and inflict poison damage, they aren't particularly scary. But as you enter an unusually rounded passageway, and the ambient sounds take on a more haunting tone, you're interrupted by a roar. To your left is now a massive, hungry, multi-eyed worm that looks like it can eat you in one bite.
  • Due to the game's age and dated graphical fidelity, the finer details of the environment may not be clear from farther away. However, when you look closely, you'll often find that a seemingly-unidentifiable pile of pixels blocking off a walkway is actually a mountain of bleached skulls.

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