History YMMV / Siralim

** The Vacuum spell copies any target's innate trait onto the caster. The thing is, this also includes the gods' Gate of the Gods boss versions of their traits. Some of them are harder to utilize than others, especially since they often require surviving to your creature's first turn to use it, and some builds auto-kill the enemy team at the start of battle anyway. The gods on whom it may be most useful, however, include Aeolian (whose team can only take damage from a certain class at at a time and is immune to indirect damage -- your creatures also get that same benefit), and especially Lister (whose team is completely immune to damage; if you vacuum his trait, all you need to do is pass turns until you win).
*** On the other hand, Anneltha counters it. Each turn she gets, your leftmost monster is wiped out and unable to revive for the battle. Unfortunately, that does not translate in your favor, as your leftmost monster still succumbs to that effect when your assimiliating monster's turn comes around.

** Reaver is another broadly disliked specialization. The specialization revolved around becoming stronger as the fight goes on, which isn’t hard to build around, but ensures that every fight is going go on for a long time. Reaver is infamously tedious to use as a result, and much like Inquisitor it gets outclassed by faster and more versatile specializations.

** Bloodmage turn HP into a god-stat that affects attacks and spells, allowing pcreatures to become Damage Sponges that deals obscene damage.

* LowTierLetdown: The Inquisitor specialization gained infamy for being one of, if not the, weakest specializations. It overall revolves around using healing magic to hurt the enemy, which is interesting but convoluted and inefficient in practice. Overtime buffs have helped it become much more useful, but it still gets outclassed by other specializations.

* TierInducedScrappy: The Inquisitor specialization gained infamy for being one of, if not the, weakest specializations. It overall revolves around using healing magic to hurt the enemy, which is interesting but convoluted and inefficient in practice. Overtime buffs have helped it become much more useful, but it still gets outclassed by other specializations.

* AuthorsSavingThrow: Lister’s trial of the gods and Jotun’s fight quickly gained negative reputations due to their quirk; outlive the enemy’s assault and eventually you win. This resulted in battles taking a long time as it was originally tied to the games exhaustion mechanic, which requires all participants to have a certain amount of turns for it to kick in. Eventually the gimmick of the two fights were changed from involving exhaustion to a hard turn number instead, making them both a lot less lengthy and tedious.

*** [[MirrorBoss T'mere M'rgo's team will copy-cast any spells and attacks that you manually perform]]. Yseros is the same... [[UpToEleven but will do it whether you meant to or not]]. Your creatures are back thanks to reviving spells? So are hers. Planning to buff your crew and debuff hers? She'll make sure everyone is on the same level. Forgot that you put that super strong all-enemy spell on one of your artifacts? Your team is probably dead. M'rgo can at least be dealt with in a few different ways, including using combinations of passively-used attacks and spells where their team won't copy them, but good luck building a sound strategy against Yseros.

** With the right combination of buffs, passive perks, equipment and party composition, an Animancer's Animatus can single-handedly wipe out enemy groups in a single turn.

** Elves. Strong monsters who specialize in shutting down a specific effect, they are especially terrifying in groups here they can completely shut down any of your teams strategies.
** Diabolic Hordes. They make themselves stronger when there are more Diabolic Hordes on their side, especially in regards to attack and health, so if you encounter a whole team of them you are have long and hard fight on your hands.
* EarlyGameHell: All games start fairly roughly, you are unlikely to find monsters that have synergy with each other early and if you go through the layers too quickly you will get floored by overleveled monsters, forcing some grinding. ''3'' and ''Ultimate'' do help soften the blow, the former gives you two starters and the latters specializations guarantee you will have some abilities to help even the odds.

** Witch Doctor focuses on making the enemy themselves, get the right monsters on board to maximize effectiveness and the enemies will consistently end themselves turn one.

* ThatOneLevel: The Kingdom of Heretics, realm of the god of war Gonfurian. It has large amount of annoying monsters including Centaurs (attacking extra times if they kill someone), Valkyries (countering attacks), Doom Guards (increasing his allies defense), and Diabolic Hordes (being stronger Ron the presence of other Diabolic Hordes).

* DemonicSpiders: Elves. Strong monsters who specialize in shutting down a specific effect, they are especially terrifying in groups here they can completely shut down any of your teams strategies.

** Witch Doctor focuses on making the enemy themselves, get the font monsters on board to maximize effectiveness and the enemies will consistently end themselves turn one.

** Loid in ''Ultimate'' is the first real challenge you'll face, which can be a shock since [[WakeUpCallBoss he's only the third boss]]. His ability not only either scorns or silences your monsters depending on whether or not they directly attack or cast a spell, but also boosts his stats every time it goes off. Not only that, he's accompanied by Smog minions who ''will'' poison your entire party unless they're taken out ''immediately''.

* DemonicSpiders: Elves. Strong monsters who specialize in shutting down a specific effect, they are especially terrifying in groups here they can completely
shut down any of your teams strategies.
* EarlyGameHell: All games start fairly roughly, you are unlikely to find monsters that have synergy with each other early and if you go through the layers too quickly you will get floored by overleveled monsters, forcing some grinding. 3 and Ultimate do help soften the blow, the former gives you two starters and the latters specializations guarantee you will have some abilities to help even the odds.

* DemonicSpiders: Elves. Strong monsters who specialize in shutting down a specific action, they are especially terrifying in groups.

* EarlyGameHell: All games start fairly roughly, you are unlikely to find monsters that have synergy with each other and if you go through the layers too quickly you will get floored by overleveled monsters, forcing some grinding. 3 and Uptimate do help soften the blow, the former gives you two starters and the latters specializations guarantee you will have some abilities to help even the odds.

* GameBreaker: Some of the specializations ''Ultimate'' are especially potent.
** Cleric gives you unmatched survivability, making your team almost unlikeable whilst the enemy just gets more tired as it tries to kill you.

** The Undead Horde in ''3'' is generally considered the point at which the game stops giving you an easy time and [[DifficultySpike drastically ramps up the difficulty]]. It is also the introduction of Horde battles, where the player must keep defeating monsters sequentially within a single battle until the reinforcements run out. It doesn't help that veteran players of the Siralim series will recognize several of the named monsters as citizens of Siralim's castle from ''1'' and ''2'', formerly helpful and friendly folks [[BrainwashedAndCrazy transformed against their will]] into horrible undead monstrosities.

* EvenBetterSequel: Each subsequent Siralim game is widely considered better than the one that can’t before it thanks to major additions to the gameplay and overall quality raising.

* ThatOneBoss: Judgement and Mercy in ''2''. Judgement's ability is an HPToOne attack that ''also'' grants him a free attack, and he will ''always'' go first, meaning that unless you have powerful barriers, at least one of your monsters is dead meat. Not only that, but unless you've done extensive grinding up to this point, the enemies are almost guaranteed to be faster than you, meaning your party can very well be wiped out before you even get a single turn.