YMMV / Unepic

• Anvilicious: The dialogue, especially in the later areas, all but rants about a number of concerns regarding gaming in general. This includes rejecting the notion of Fake Difficulty, mocking predictability in games, dressing down forum complainers, and more.
• Demonic Spiders:
  • The green animated armors walking the Halls are nearly impossible to handle in a straight melee fight. They have lots of HP, resist edged weapons, don't suffer from hitstun, wield spears that allow them to attack you beyond your usual weapon range and their spears are tipped with a VERY aggressive and durable poison that will probably kill you long before it wears off. And their poisonous attacks can stack. If you get hit by more than one attack you'll have only seconds to warp back to the save point before you die. However they aren't immune to status effects and have a conveniently placed safe spot right INSIDE them where you can hit them but they can't hit you.
  • The thieving ghosts in the forgotten tower are this. (at least until you memorize their location) Just touching them (even if they're stunned) will cause them to steal one of your weapons which they will then happily use against you for some nasty damage. Until they steal something they're completely invisible unless you use a certain spell which you might not have or use a certain potion which is limited in supply and only lasts for a short while. And they can only be harmed by one spell.
  • The mages at the final part of the castle also qualify, especially due to the fire and arcane mages' tendency to summon minions that can quickly overwhelm you.
• Difficulty Spike:
  • The first four areas may have thrown the occasional monster crowd at you already, but most of the time a little planning could get you through the game as a melee character without major problems. Then you open the gate to the catacombs and are faced with several groups of 4 to 6 skeletons without the ability to pick them off one at a time. It's a hint that the game just got serious and for most of the area, you'll be facing large groups of armed skeletons in extremely close quarters. It's probably no coincidence that the sole item that allows you to reconfigure your stats (allowing you to raise your magic skill even if you neglected it before) is located here. This area is even worse on the hardest difficulty level, since you no longer have Mercy Invincibility and being cornered by two or more skeletons is pretty much instant death.
  • The Laboratory adds another level in difficulty with enemies that are prone to give you quite a shocking experience, melt the flesh off your bones, or squash you like mashed potatoes. And then there's the Halls, in which EVERY enemy except the bats can inflict you with a variety of status, like Burning, Poison, Slippery Hands, and polymorph your current weapon into a ridiculously weak Toy Hammer.
• That One Boss:
  • Neuron, the fourth guardian, which is a giant floating brain with one eye and mind control abilities. The only way he can directly hurt you is through an unavoidable beam that steadily leaches 4 hp at a time from you, meaning it takes him a long time to kill you. Unfortunately, he's difficult to reach and all projectiles shot at him bounce right back at you. What really causes the annoyance factor to go through the roof are his mental attacks, which can make you do all sorts of things to screw yourself over, like forcing you to empty your potions, manipulating you into casting a splash damage spell when you're close to a wall or controlling you into using your own emergency warp item to reset the fight. The only way to beat him is to preemptively empty your inventory of anything he can use against you.
  • There's also Medeox, the seventh guadian, which is a giant floating gorgon head with one eye that instantly turns your to stone if you're facing to the right, which counts as an insta-death. This can be very annoying, especially if you haven't been timing his attack patterns to know when to look away, which can cause you to become petrified in the middle of casting an offensive spell or firing an arrow.
• Values Dissonance: Most of the humor of the game is very hard to swallow for non-Spaniard players since Daniel and most of the human characters from his world behave like stereotypical Spaniard teenagers. Almost every non-Spanish translation struggles on catching the nuances of their speech, since the original Spanish dialog is full-chock of Spaniard slang and references that could be incredibly difficult to translate even for other Spanish speakers outside Spain.
• Woolseyism: In almost every non-Spanish translation: Since the dialog is full of Spaniard slang, including some obscure terms only applicable within Spain, all foreign translations uses most the common equivalent terms (slang, expletive or otherwise) in their respective translations. For a better example, here's a sample from the English translation of the prologue:
  Daniel (Spanish): Eh tios, hagamos una pausa, que tengo que ir al meodromo
  Daniel (Official English translation): Hey guys, let's take a break, I have to pee.
  Daniel (Literal English translation): Hey dudes, give me a break, I have to go the the piss-o-drome.