YMMV / Sinjid

• Demonic Spiders:
  • Reapers in Battle Arena. Not only are they sometimes invisible due to a glitch, making them hard to predict, they can also kill you in a single hit, and attack quickly.
  • Mistwalkers in Sinjid can be this if you lack range and/or durability. Not only do they utilize an incredibly powerful poison that practically amounts to a One-Hit Kill if you can't find a way around it, they also move quickly, making them difficult to approach. Their only weaknesses are their lack of range and durability when compared to most end-game mooks, but said speed allows them to cover large distances, so you have to act fast if you're within their sight. Fortunately, they are limited to the final level, and only four of them appear per visit.
  • Ichisan Priests, also from Sinjid, aren't usually a problem in their standard state, but have a buff that vastly increases their power, and when combined with their homing fireballs and habit of fighting from afar, will result in a nigh-unstoppable force that can easily wipe the floor with you. And they usually come with allies to stall you, allowing them to activate it when you're busy fighting their friend. Fortunately, the buff can be cancelled by stunning them when they're charging it up, but if you have no way of doing so, you're most likely out of luck.
  • Shiroda Priests. There are only two in the last level, but they're easily harder then every boss. Imagine the third boss (teleportation, summons slaves that last for ten seconds with the ability recharging in about five, and periods of invincibility) combined with slowing projectiles guaranteed to hit and the ability to drain your Focus... and a very powerful Spirit Blade attack that borders on One-Hit Kill territory on higher difficulties. And unlike the third boss, they have incredibly competent AI, meaning that they won't waste time just standing there. They'll run away when their abilities are on cooldown, teleport to the other sides of walls to give themselves more time, and use Spirit Blade when you're slowed down or occupied by their servants. They also have incredible healing power and massive amounts of health. It's such a powerful enemy that only one class (the Assassin) is able to take them down efficiently; the other available classes struggle to kill them due to their aforementioned properties.
• Game-Breaker:
  • The Warrior class in Shadow of the Warrior can become a nigh-unstoppable force with the combination of Shadow equipment and the Avenger skill; Shadow equipment grants boosts to speed, allowing the normally slow Warrior to keep up with their opponents while still dishing out and taking sufficient damage, and the Avenger skill increases damage based on how much health the user loses, which is the perfect ability for the class with the best defenses in the game. This can be taken further by only boosting the Warrior's health and Avenger points after reaching level 10 (the level at which you acquire the skill), allowing the player to dish out and take even more damage while still retaining their speed boosts. There are downsides to this setup such as the Warrior starting off at a disadvantage due to being unable to keep up with most opponents and the player being unable to get the Avenger skill and the Shadow equipment before respectively reaching said level and beating the Human Portal, but the benefits this setup has to offer outweigh the drawbacks by a longshot.
  • The Hunter class in Sinjid, being the pay-to-play class, pretty much destroys most, if not all, of the game's difficulty. While it can be hard to master due to having no way of recovering Focus and the player having to learn the different requirements for unleashing combos, the devastating power of said combos makes up for it, being able to destroy nearly any enemy with ease.
  • The Assassin is another example of a class that seems weak initially but has devastating combos. By starting off every battle with a few shurikens, going for a clone when they get close enough, using Shadow Reflex (Restores all Focus and, for your next attack, doubles Agility and guarantees a crit, making shurikens do 4 times as much damage as usual), using a Smoke Bomb (offers immunity to projectiles and strongly debuffs enemies in its radius), then going for a few kicks and strikes if they choose to charge up a move. That alone is usually able to end most battles within thirty seconds of contact. If the battle's taking too long, simply backup, let your clone do some work, and heal. Of course, there's an Early Game Hell for Assasins due to their overreliance on skills, but it's worth it for the ability to beat Shiroda Priests within two minutes.
  • Quite a few pieces of equipment are broken. There are too many specific examples to list, so some buff descriptions should help. These include gloves that boost healing and Intellect to the point where you get all of your health back if you're a Priest, scythes that bleed the enemy (slowing them down and doing decent damage over time), poison weapons which do the same thing but stack, staffs with 180 Intellect and Destroyer, masks which increase Strength by half of your Intellect, kunai that offer more crits and 180 Agility, Solidarity equips, Swiftness equips, cooldown reducing equips and so on. The Warrior gets the worst selection, while the Assassin (a Fragile Speedster who can be upgraded to a Master of All with the right setups) gets the lion's share due to his ability to effectively utilize the mask and shako while also having quite a few stats that are boosted by his massive Agility.
• Goddamned Bats: Assailants in Shadow of the Warrior are this, especially if your character is slow. They're fairly fragile, but they have the third-highest speed in the game, making them hard to hit unless you use the Shadow Ninja class, and also pack a fair bit of power due to all their attacks doing damage based on speed, which is their highest stat, allowing them to slowly chip away at your health while you most likely can't do a thing to stop them.
• Goddamned Boss: Lord Dai'jin in Sinjid is slow, making most of his attacks relatively easy to dodge, but he can take a long time to kill due to his Immunity ability. Immunity stacks every time he's struck, and for each stack of it he has, his defenses increase by 15% along with rapid healing. You can easily turn him Nigh-Invulnerable if you don't time your attacks carefully. He can also slow you down with Slash Harken if you stray too far, which leaves you vulnerable to his shockwave attack, which stuns you and does a ton of damage, making the battle more challenging for those trying to escape his attacks. All in all, not the most challenging boss you'll face in the game, but can easily become one of the most aggravating.
• Good Bad Bug: In Battle Arena, if the player presses the attack button just as a Reaper-type enemy lands their signature One-Hit Kill attack, they will survive despite having 0 or negative HP. When paired with Vengence Blade (sic), which does more damage the lower the user's health is, Sinjid will do tons of damage to the Reaper, usually enough to kill them in one strike. Quite useful, considering how difficult they are to beat in standard play. That said, doing so is risky, as the Reaper might opt to use their comparatively faster standard attack afterwards, which can and will lead to Critical Existence Failure if the player doesn't use the attack fast enough, so they're still dangerous either way.
• That One Boss:
  • The Blood Spirit in Shadow of the Warrior is considered by many players to be the most challenging boss in the game thanks to it having a combination of powerful attacks that never miss and a nearly impenetrable shield. Shadow Ninjas in particular struggle to bring it down as their low defenses makes them very susceptible to said attacks.
  • Lord Takeshi's Regenerating Health in Sinjid is just too strong; he can easily recover most of his health in seconds even when you're actively attacking him, making him a pain to kill. The game recommends keeping pressure on him so that his regeneration rate doesn't overpower the damage you do to him, but it's not easy to do, as he will use a toxic cloud that stuns you if you stay too close for him for too long. This is especially bad for Warriors as they mostly rely on close-range combat due to their lack of ranged attacks.
  • Lady Shiori from Sinjid is also a source of frustration for many players, due to her unique attack: the paralyzing stare. It charges quickly, and if you happen to be looking at her while she does it, you'll become immobilized and take heavy damage, allowing her to take you out with a cheap shot, making her hard to approach (and even if you do look away, you'll still take damage). You have to constantly be on guard if you want to get some hits in, and it doesn't help that she likes to take to the air, surround herself with a barrier that tanks all damage, and fire heavily damaging poison shots if you get past her barrage of paralyzing stares.