Damage Types

Damage is most commonly Physical. This includes hits by Blades, Sniper Rifles, etc.

Non-physical, also called special damage, comes in four flavours. Fire is mainly associated with Hand-Flamers and Flamers. Plasma with various Templar Weapons such as Plasma Rifles. Radiation is purely the territory of aliens, while Bio-Poison is can only be found on some Templar Weapons.

Each damage type has a corresponding Res, but Templars have no Bio-Poison Res (because no Enemies have Bio-Poison attacks), while Enemies have no Radiation Res for similar reasons.