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, depending on the weapon tech level
  • Bring 'Em On +1 to +5 bonus, 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 Results

Weapon	Base Damage	Crit Damage	Headshot (Base)	Headshot (Crit)	HEAT Ammo (Base)	HEAT Ammo (Crit)	Killer Instinct (Base)	Killer Instinct (Crit)
Pistol Pistol (III) Laser Pistol	1	2	NA	NA	NA	NA	NA	NA
Pistol Pistol (III) Laser Pistol Laser Pistol (III) Plasma Pistol Assault Rifle	2	3	NA	NA	NA	NA	NA	NA
Laser Pistol Pistol (III) Laser Pistol (III) Plasma Pistol Assault Rifle Plasma Pistol (III) LMG Sniper Rifle Shotgun	3	4	5	7	6	8	4	6
Laser Pistol (III) Plasma Pistol Assault Rifle Plasma Pistol (III) LMG Sniper Rifle Shotgun Laser Rifle Plasma Light Rifle	4	6	6	8	8	12	6	9
Plasma Pistol (III) LMG Sniper Rifle Shotgun Laser Rifle Plasma Light Rifle Heavy Laser Laser Sniper Rifle Laser Scatter	5	7	7 9	9 11	10	14	7	10
Laser Rifle Plasma Light Rifle Heavy Laser Laser Sniper Rifle Laser Scatter Plasma Rifle	6	9	10	13	12	18	9	13
Heavy Laser Laser Sniper Rifle Laser Scatter Plasma Rifle	7	10	11	14	14	20	10	15
Plasma Rifle Heavy Plasma Plasma Sniper Rifle Alloy Cannon	8	12	14	18	16	24	12	18
Heavy Plasma Plasma Sniper Rifle Alloy Cannon	9	13	15	19	18	26	13	19
Heavy Plasma Plasma Sniper Rifle Alloy Cannon	10	15	16	21	20	30	15	22

• Maximum Damage as listed during missions; Base Damage as listed on the Armory stats; Minimum Damage also listed.
• 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.

Confirmed Game Values

• Pistol: 3 crit (no extra damage perks)
• Plasma Pistol: 9 crit (Sniper, Gunslinger, all Pistol upgrades)
• Sniper Rifle: 10 crit (Headshot)
• Plasma Sniper Rifle: 20 crit (Headshot)
• Rocket Launcher: 16 (HEAT Ammo + Mayhem vs Sectopod/Cyberdisc/Drone) = max Rocket damage (tried it twice with and without Shredder Rocket, both times got the same 16 Damage result)

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	Average Base Damage	Crit Damage	Critical Chance	Maximum Damage (Base + Crit)?	Sectoid	Thin Man Floater	Outsider Drone	Chryssalid	Muton Zombie	Heavy Floater Muton Elite Sectoid Commander	Cyberdisk Bezerker Ethereal	Sectopod
					3	4	5	8	10	14	20	30
Pistol	1-2	1	0	2
Laser Pistol Laser Pistol (I)	2	3	10 30	5	CRIT	CRIT	CRIT
Laser Pistol (I & III)	3	3	30	6	BASE	CRIT	CRIT
Plasma Pistol Assault Rifle Plasma Pistol (I)	3	4	0 10 20	7	BASE	CRIT	CRIT
Plasma Pistol (I & III)	4	4	20	8	BASE	BASE	CRIT	CRIT
LMG Sniper Rifle Shotgun	4	6	0 25 20	10	BASE	BASE	CRIT	CRIT	CRIT
Laser Rifle Plasma Light Rifle	5	7	10	12	BASE	BASE	BASE	CRIT	CRIT
Heavy Laser Laser Sniper Rifle Laser Scatter	6	9	10 30 20	15	BASE	BASE	BASE	CRIT	CRIT
Plasma Rifle	7	10	10	17	BASE	BASE	BASE	CRIT	CRIT	CRIT
Heavy Plasma Plasma Sniper Rifle Alloy Cannon	9	13	10 35 20	22	BASE	BASE	BASE	BASE	CRIT	CRIT	CRIT

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