|Unit Information||Game Strategies||History|
| In the Extended Edition, this unit/building is affected by a damage bug.
However, Arquebus Immortals have the very special advantage of a ranged attack, with a range equal to that of the standard Light Infantry line, as well as being considered as a Gunpowder Heavy Infantry, akin to the later Fusiliers. Being ranged has a disadvantage, however; unlike Elite Pikemen, Arquebus Immortals lack the 80% damage bonus against Supply Wagons that melee units have.
Their ranged nature, combined with higher speed, make Arquebus Immortals excellent for hit-and-run tactics against enemy Heavy Infantry, and gives them a significant edge in combat against them, as they can inflict plenty of damage before the enemy can close in and engage (if they manage to engage in the first place), more than compensating for their slight disadvantage in damage and toughness; these strengths also make Arquebus Immortals particularly tough raiders and even more deadly to enemy Light Infantry than other Heavy Infantry units.
Despite wielding guns, Arquebus Immortals have a projectile speed of only 100 (compared to guns normally having a projectile speed of roughly 300-450). This means their projectiles are actually far slower than that of Crossbowmen - although because of the Arquebus Immortal's lower range, the effect is less noticeable than other units with the same projectile speed (such as Bowmen and Archers). It's likely that this projectile speed is not intentional, but rather an error made during the unit's creation.
- Arquebus Immortals, along with Tercios and the New World campaign-only Bandeirantes, are the only Gunpowder Age Heavy Infantry to have a ranged attack.
- In unit_rules.xml Arquebus Immortals are incorrectly named as Arqimmortals, which causes minor issues such as balance.xml modifiers not applying to the unit.