Sneaking silently:
The formula for the % chance for a non-thief to sneak undetected is as follows:
Coordination ÷ 2 (rounded down) = the % chance.
Note:
A character with the ability to move or sneak without detection may use this as a second chance to remain undetected.
Armor penelties for sneaking:
The following are the penalties for all characters and creatures to sneak silently vs. the type of armor worn. Alloys do not matter; the make of the armor is what causes this penalty as follows:
Penalty to sneak silently vs. armor worn:
Leather: None
Skin: None
Ring: -20
Scale: -25
Chain: -15
Banded: -30
Splinted: -30
Plate: -35