Damage (EU2012)

Damage System

• Regarding the different numbers seen in the Armory info and the actual game values, it seems that the Base Damage range can vary, i.e. a weapon listed with a 9 damage can vary between 8 and 10 and you see the Maximum Damage listed onscreen during the game before firing.
• If the shot is a hit the game will then check to see its Critical Chance.
• If the Critical Chance roll is successful, the game will then calculate the Critical Damage.
• In addition, there are also specific Class perks that can increase Damage (both Base and Crit), such as:
  • Headshot (Sniper) +2/4/6 Damage to Sniper Rifle, depending on weapon tech value
  • Gunslinger (Sniper) +2 Damage to pistols
  • Shredder (Heavy) +33% Damage from all sources to the target
  • HEAT Ammo (Heavy) +100% Damage against robotic enemies
  • Mayhem (Heavy) +1 to +3 Damage, depending on the weapon tech level
  • Bring 'Em On +1 to +5 bonus Critical Damage, depending on the number of enemies
  • Killer Instinct +50% Critical Damage
• Damage is rounded down.
  • For example rocket to shredded target will do 6*1.33=7.98 -> 7 damage, and Mindfray to stimmed target will do 5*0.5 = 2.5 -> 2 damage.
• There seems to be a Damage cap (at least for explosives) - Rocket Launchers will deal 16 max damage using HEAT and Mayhem, regardless of using Shredder rockets or not.

Critical Damage

The game code that calculates Critical Damage is:

if(bCritical)
{
	iDamage += 1;
 	iDamage = int(float(iDamage) * 1.50);
	iDamage += class'XComEngine'.static.SyncRand(3, string(Name) @ string(GetStateName()) @ string(GetFuncName())) - 1;
	return iDamage;
}

• Critical Damage is simply calculated by increasing the iDamage (Base Damage) roll by a factor of 1.5 before applying the bonuses/penalties from abilities/perks.
• The range for the actual iDamage seems to be a random roll with a range of -1 to apparently the integer that precedes the Critical Damage value. Thus, Base Damage from an Assault Rifle can vary between 3 and 4 while with a Plasma Sniper Rifle it can vary between 8 and 12.

Damage Values

Weapon	Base Damage	Crit Damage
Pistol Pistol (III) Laser Pistol	1	2
Pistol Pistol (III) Assault Rifle Laser Pistol Laser Pistol (III) Plasma Pistol	2	3
Pistol (III) Assault Rifle LMG Sniper Rifle Shotgun Laser Pistol Laser Pistol (III) Plasma Pistol Plasma Pistol (III)	3	4
Assault Rifle LMG Sniper Rifle Shotgun Laser Pistol (III) Laser Rifle Plasma Pistol Plasma Pistol (III) Plasma Light Rifle	4	6
LMG Sniper Rifle Shotgun Laser Rifle Heavy Laser Laser Sniper Rifle Laser Scatter Plasma Pistol (III) Plasma Light Rifle	5	7
Laser Rifle Heavy Laser Laser Sniper Rifle Laser Scatter Plasma Light Rifle Plasma Rifle	6	9
Heavy Laser Laser Sniper Rifle Laser Scatter Plasma Rifle	7	10
Plasma Rifle Heavy Plasma Plasma Sniper Rifle Alloy Cannon	8	12
Heavy Plasma Plasma Sniper Rifle Alloy Cannon	9	13
Heavy Plasma Plasma Sniper Rifle Alloy Cannon	10	15

• Damage can vary between -1 and +1 of the value listed on the Armory. Maximum damage is listed during missions.
• The results for the other perks can be deduced from this table by calculating the corresponding additions, i.e. Gunslinger will add +2 to Pistol iDamage, Bring 'Em On will also add a variable number, while Shredder will add 33% to the end Damage value.
• Headshot adds +2/4/6 damage to Sniper Rifle shots, depending on its tech level.

Weapons Kill Table

• Based on the above model, the tables below indicate how many shots (Base or Critical) are usually required to take down the aliens.
• BASE = alien can be killed with 1 shot dealing average (non-critical) damage
• CRIT = alien requires either 2 base shots or 1 critical hit with close to maximum critical damage.

Classic

Weapon	Damage Range	Max Crit Damage	Critical Chance	Sectoid	Thin Man Floater	Outsider Drone	Chryssalid	Muton Zombie	Heavy Floater Muton Elite Sectoid Commander	Cyberdisk Bezerker Ethereal	Sectopod
Alien HPs				3	4	5	8	10	14	20	30
Pistol	0-2	0-1	0
Pistol (III) Laser Pistol	1-3	0-1	10	CRIT	CRIT	CRIT
Laser Pistol (III) Plasma Pistol Assault Rifle	2-4	1-2	10 0 10	BASE	CRIT	CRIT
Plasma Pistol (III)	3-5	1-2	20	BASE	BASE	CRIT	CRIT
LMG Sniper Rifle Shotgun	3-5	1-2	0 25 20	BASE	BASE	CRIT	CRIT	CRIT
Laser Rifle Plasma Light Rifle	4-6	2-3	10	BASE	BASE	BASE	CRIT	CRIT
Heavy Laser Laser Sniper Rifle Laser Scatter	5-7	2-3	10 30 20	BASE	BASE	BASE	CRIT	CRIT
Plasma Rifle	6-8	3-4	10	BASE	BASE	BASE	CRIT	CRIT	CRIT
Heavy Plasma Plasma Sniper Rifle Alloy Cannon	8-10	4-5	10 35 20	BASE	BASE	BASE	BASE	CRIT	CRIT	CRIT

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