In Restoration of Erathia and Armageddon’s Blade, Angels and Archangels didn’t require gems to recruit. This resource cost was added later in the Shadow of Death expansion.

Vey and Xarfax are the only magic-class heroes who begin the game with the Leadership secondary skill.

In Restoration of Erathia and Armageddon’s Blade, there was a unique case where a creature’s damage decreased after an upgrade — Hell Hounds dealt 2–7 damage, while their upgrade, Cerberi, dealt only 2–5. This was later corrected in The Shadow of Death.

The special Fortress building Glyphs of Fear actually provides +2 Attack during sieges, not Defense as stated in its description. Similarly, the Blood Obelisk grants +2 Defense, not Attack.

Gold Golems have an alternative melting death animation that is not used in the original game. In Horn of the Abyss, however, this animation is restored and plays when a Gold Golem is destroyed by magic.

Garrisoned heroes do not appear in the Best Hero category in the Thieves’ Guild, while garrisoned creatures can still show up in the Best Monster category.

Rashka, the Demoniac hero from Inferno, is the only might-oriented hero who starts with the Wisdom secondary skill.

Torosar is the only hero with a Ballista specialty who doesn’t start with the Artillery secondary skill. However, he does begin with a Ballista. Additionally, he’s the only Tower hero who starts with Tactics.

If a hero’s ranged unit ends up next to an enemy war machine, it won’t be able to perform a ranged attack.

The Berserk spell automatically wears off after 255 rounds, if the affected unit hasn’t hit or damaged anyone during that time.

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