Armor check penalty

Armor check penalty (ACP) is a penalty to some skills due to the restrictiveness of certain armors and shields.

The following are subject to Armor check penalty:
 * Balance
 * Hide
 * Jump
 * Move Silently
 * Swim is subject to double the standard Armor check penalty
 * Tumble

Armor check penalties from armors and shields stack.

Non-proficiency penalties
ACPs always apply to your skills. Non-proficiency with an armor or shield causes its Armor check penalty to apply to your attack rolls as well.

Carrying capacity
Carrying capacity also can cause an Armor check penalty.


 * Medium encumbrance causes a -3
 * Heavy encumbrance causes a -6

Note that medium encumbrance does not give any visual feedback, except that you run slightly slower. This may lead to unexpected deaths while swimming.