Melee

Information
Melee damage is almost always dependent on a character's Strength  attribute and is typically delivered from an adjacent tile when a character walks into an enemy.

There are a large number of perks that interact with melee damage during combat calculations:
 * Liquid-Form - Enemies with the liquid-form perk are quasi-corporeal and difficult to swing at. This results in as much as a 25% melee damage reduction and a resistance to Fire damage. Enemieswith this perk are quite formiddable.
 * Undead - The meek and the intelligent experience Fear while attacking the Undead with melee damage. This results in up to a 25% damage reduction to the Undead.The Lesser and Genius perks make characters susceptible to fear.
 * Horror - All characters experience fear when dealing melee damage to Horrors, and the meek & the intelligent experience intense fear which causes an overall 50% melee damage reduction.
 * Mechanical - Mechanical enemies, in most cases, have a great deal of protection against melee attacks. However geniuses are actually granted a melee damage bonus against them.