User:BoxFigs/Health and Damage
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Contents
Half-Life[edit]
Player[edit]
The player has a maximum of 100 health and 100 suit. If the player has at least 1 suit, the damage to health is divided by 5 and half of the remaining damage is dealt to the suit. In other words, the health takes 20% of the damage, while the suit takes 80%/2 of the damage. To calculate this for any amount of damage, use these formulas:
dmgHealth = dmg / 5 dmgSuit = (dmg - dmg / 5) / 2
This is evidenced in the source code by lines 485-489 of dlls/player.cpp:
float flNew = flDamage * flRatio; float flArmor; flArmor = (flDamage - flNew) * flBonus;
"flArmor" is the new armor value, "flRatio" is the ratio of health to suit points, and "flBonus" is the ratio of the damage to health over the damage to suit. "flRatio" is set to 0.2, which means health takes 1/5 of the damage and the suit takes 4/5 of the damage. "flBonus" is set to 0.5, which makes the suit lose half as much points as it would have. In multiplayer, the amount of damage dealt to the suit is multiplied by 2 when taking damage from explosions.
The suit protects against all damage types except for falling and drowning.
If the player's current suit power is less than the damage that will be dealt to the suit, the damage to the player's health is subtracted by half of the suit power, then the suit power is set to 0.
NPCs[edit]
NPCs have the following maximum health values:
| Name | Health (Easy) | Health (Normal) | Health (Hard) |
|---|---|---|---|
| Alien Grunt | 60 | 90 | 120 |
| Apache | 150 | 250 | 400 |
| Barnacle | 25 | 25 | 25 |
| Security Guard | 35 | 35 | 35 |
| Bullsquid | 40 | 40 | 120 |
| Gargantua | 800 | 800 | 1000 |
| Assassin | 30 | 50 | 50 |
| Headcrab | 10 | 10 | 20 |
| Marine | 50 | 50 | 80 |
| Houndeye | 20 | 20 | 30 |
| Vortigaunt | 30 | 30 | 60 |
| Ichthyosaur | 200 | 200 | 400 |
| Leech | 2 | 2 | 2 |
| Alien Controller | 60 | 60 | 100 |
| Nihilanth | 800 | 800 | 1000 |
| Scientist | 20 | 20 | 20 |
| Snark | 2 | 2 | 2 |
| Zombie | 50 | 50 | 100 |
| Automatic Turret (Large) | 50 | 50 | 60 |
| Automatic Turret (Small) | 40 | 40 | 50 |
| Sentry Gun | 40 | 40 | 50 |
Some NPCs have special damage values for inherent attacks. Damage values using weapons are discussed in the next section.
| Name | Attack | Damage (Easy) | Damage (Normal) | Damage (Hard) |
|---|---|---|---|---|
| Alien Grunt | Punch | 10 | 20 | 20 |
| Barnacle | Bite | 10 | 10 | 10 |
| Bullsquid | Spit Bite Tail whip |
10 15 25 |
10 25 35 |
15 25 35 |
| Gonarch | Slash Blast |
50 100 |
60 120 |
70 160 |
| Gargantua | Flames Punch Stomp |
3 10 50 |
5 30 100 |
5 30 100 |
| Headcrab | Bite | 5 | 10 | 10 |
| Marine | Kick | 5 | 10 | 10 |
| Houndeye | Shockwave | 10 | 15 | 15 |
| Vortigaunt | Claw Zap |
8 10 |
10 10 |
10 15 |
| Ichthyosaur | Bite | 20 | 35 | 50 |
| Leech | Bite | 2 | 2 | 2 |
| Alien Controller | Orbs | 3 | 4 | 5 |
| Nihilanth | Orbs | 30 | 30 | 50 |
| Snark | Bite Explode |
10 5 |
10 5 |
10 5 |
| Zombie | Claw slash | 10 | 20 | 20 |
Weapons[edit]
Weapons can be used by the player and NPCs. However, the damage they deal is different depending on if a player is using it or an NPC is using it.
Player:
| Weapon | Damage (Primary fire) | Damage (Alt fire) |
|---|---|---|
| Crowbar | 5 | |
| Pistol | 8 | |
| Magnum | 40 | |
| SMG | 5 | 100 |
| Shotgun | 5/6: 30 | 5/12: 60 |
| Crossbow | 50 | |
| Hivehand | 7 | |
| RPG | 100 | |
| Tau Cannon | 20 | 25-200 |
| Gluon Gun | 14 | |
| Grenade | 100 | |
| Satchel Charge | 150 | |
| Tripmine | 150 |
NPCs:
| Weapon | Damage (Easy) | Damage (Normal) | Damage (Hard) | Used By |
|---|---|---|---|---|
| Pistol | 5 | 5 | 8 | Security Guards, Black Ops Assassins |
| SMG | 3 | 4 | 5 | Marines |
| Shotgun | 5 | 5 | 8 | Marines |
| Hivehand | 4 | 5 | 8 | Alien Grunts |
Taking damage[edit]
Players and NPCs take damage in the same way, including headshots. Headshots multiply the normal damage by 3. Headshots can be performed only with guns on humanoid NPCs or the player.
The following tables show how many body hits/shots with each weapon are required to kill specific NPCs
Easy/Normal:
| NPC | Crowbar | Pistol | Magnum | SMG | SMG Grenade | Shotgun | Shotgun (double shot) | Crossbow | Hivehand | RPG | Tau Cannon | Tau Cannon (charged) | Gluon Gun | Grenade | Satchel Charge | Tripmine |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alien Grunt | 12 18 |
8 12 |
2 3 |
12 18 |
1 | 2 3 |
1 2 |
2 | 9 13 |
1 | 3 5 |
3-1 4-1 |
5 7 |
1 | 1 | 1 |
| Apache | 30 50 |
19 32 |
4 7 |
30 50 |
2 3 |
5 9 |
3 5 |
3 5 |
22 36 |
2 3 |
8 13 |
6-1 10-2 |
11 18 |
2 3 |
1 2 |
1 2 |
| Barnacle | 5 | 4 | 1 | 5 | 1 | 1 | 1 | 1 | 4 | 1 | 2 | 1 | 2 | 1 | 1 | 1 |
| Security Guard | 8 | 5 | 1 | 8 | 1 | 2 | 1 | 1 | 5 | 1 | 2 | 2-1 | 3 | 1 | 1 | 1 |
| Bullsquid | 8 | 5 | 1 | 8 | 1 | 2 | 1 | 1 | 6 | 1 | 2 | 2-1 | 3 | 1 | 1 | 1 |
| Gargantua | 160 | 100 | 20 | 160 | 8 | 27 | 14 | 16 | 115 | 8 | 40 | 32-4 | 58 | 8 | 6 | 6 |
| Assassin | 6 10 |
4 7 |
2 | 6 10 |
1 | 1 2 |
1 | 1 | 5 8 |
1 | 2 3 |
2-1 | 3 4 |
1 | 1 | 1 |
| Headcrab | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Marine | 10 | 7 | 2 | 10 | 1 | 2 | 1 | 1 | 8 | 1 | 3 | 2-1 | 4 | 1 | 1 | 1 |
| Houndeye | 4 | 3 | 1 | 4 | 1 | 1 | 1 | 1 | 3 | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
| Vortigaunt | 6 | 4 | 1 | 6 | 1 | 1 | 1 | 1 | 5 | 1 | 2 | 2-1 | 3 | 1 | 1 | 1 |
| Ichthyosuar | 40 | 25 | 5 | 40 | 2 | 7 | 4 | 4 | 29 | 2 | 10 | 8-1 | 15 | 2 | 2 | 2 |
| Leech | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Alien Controller | 12 | 8 | 2 | 12 | 1 | 2 | 1 | 2 | 9 | 1 | 3 | 3-1 | 5 | 1 | 1 | 1 |
| Nihilanth | 160 | 100 | 20 | 160 | 8 | 27 | 14 | 16 | 115 | 8 | 40 | 32-4 | 58 | 8 | 6 | 6 |
| Scientist | 4 | 3 | 1 | 4 | 1 | 1 | 1 | 1 | 3 | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
| Snark | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Zombie | 10 | 7 | 2 | 10 | 1 | 2 | 1 | 1 | 8 | 1 | 3 | 2-1 | 4 | 1 | 1 | 1 |
| Automatic Turret (Large) | 10 | 7 | 2 | 10 | 1 | 2 | 1 | 1 | 8 | 1 | 3 | 2-1 | 4 | 1 | 1 | 1 |
| Automatic Turret (Small) | 8 | 5 | 1 | 8 | 1 | 2 | 1 | 1 | 6 | 1 | 2 | 2-1 | 3 | 1 | 1 | 1 |
| Sentry Gun | 8 | 5 | 1 | 8 | 1 | 2 | 1 | 1 | 6 | 1 | 2 | 2-1 | 3 | 1 | 1 | 1 |
Half-Life 2[edit]
Player[edit]
The player has a maximum of 100 health and 100 suit. In the chapter Our Benefactors, the player has a maximum of 200 suit. Note that this is technically a property of the suit chargers in the chapter's levels rather than the chapter itself.
If the player has at least 1 suit, the damage to health is divided by 5 and the rest of the damage is dealt to the suit. In other words, the health takes 20% of the damage, while the suit takes 80% of the damage. To calculate this for any amount of damage, use these formulas:
dmgHealth = dmg/5 dmgSuit = dmg - dmg/5
This is evidenced in the source code by lines 1160-1164 of game/server/player.cpp:
float flNew = info.GetDamage() * flRatio; float flArmor; flArmor = (info.GetDamage() - flNew) * flBonus;
"flArmor" is the new armor value, "flRatio" is the ratio of health to suit points, and "flBonus" is the ratio of the damage to health over the damage to suit. "flRatio" is set to 0.2, which means health takes 1/5 of the damage and the suit takes 4/5 of the damage. "flBonus" is set to 1.0, which makes it effectively ignored, as it is a 1-1 ratio.
The suit protects against all damage types except for falling, drowning, poison, and radiation.
If the player's current suit power is less than the damage that will be dealt to the suit, the damage to the player's health is subtracted by the suit power, then the suit power is set to 0.
NPCs[edit]
NPCs have the following maximum health values:
| Name | Health |
|---|---|
| Civil Protection (simple) | 26 |
| Civil Protection | 40 |
| Barnacle | 35 |
| City Scanner | 30 |
| Manhack | 25 |
| Headcrab | 10 |
| Zombie | 50 |
| Fast Headcrab | 10 |
| Fast Zombie | 50 |
| Poison Headcrab | 35 |
| Poison Zombie | 175 |
| Overwatch Soldier | 50 |
| Overwatch Elite | 70 |
| Antlion | 30 |
| Antlion Guard | 500 |
| Antlion Grub | 5 |
| Hunter-Chopper | 5600 |
| Strider | 350 |
| Stalker | 50 |
| Citizen | 40 |
| Vortiguant | 100 |
NPCs that typically require an RPG to kill have special values for the number of rockets needed to kill them.
| Name | RPG Count (Easy) | RPG Count (Normal) | RPG Count (Hard) |
|---|---|---|---|
| Gunship | 3 | 5 | 7 |
| Strider | 5 | 7 | 7 |
Some NPCs have special damage values for inherent melee attacks. Damage values using weapons are discussed in the next section.
| Name | Attack | Damage |
|---|---|---|
| Barnacle | Bite | 10 |
| City Scanner | Divebomb | 25 |
| Manhack | Slice | 20 |
| Headcrab | Bite | 5 |
| Zombie | Claw slash | 10 |
| Fast Headcrab | Bite | 5 |
| Fast Zombie | Claw slash | 10 |
| Poison Headcrab | Bite | 10 |
| Poison Zombie | Claw slash | 20 |
| Rollermine | Shock | 10 |
| Antlion | Claw gouge Dive |
5 5 |
| Antlion Guard | Headbutt Charge |
10 20 |
| Overwatch Soldier | Weapon stock | 10 |
| Overwatch Elite | Weapon stock | 15 |
Weapons[edit]
Weapons can be used by the player and NPCs. However, the damage they deal is different depending on if a player is using it or an NPC is using it.
| Weapon | Damage (Player) | Damage (NPC) | Used by NPCs |
|---|---|---|---|
| Crowbar | 10 | 5 | |
| Pistol | 5 | 3 | Civil Protection |
| Magnum | 40 | 30 | |
| SMG | 4 | 3 | Civil Protection, Overwatch Soldier, Citizen |
| SMG Grenade | 100 | 50 | |
| Pulse Rifle | 8 | 3 | Overwatch Soldier, Citizen, Barney |
| Shotgun | 8/7: 56 8/12: 84 |
3/7: 21 | Overwatch Soldier, Citizen, Alyx (Episode 1) |
| Crossbow | 100 | 10 | |
| Grenade | 150 | 75 | Overwatch Soldier |
| RPG | 100 | 50 | Citizen |
| Airboat | 3 | 3 | |
| Stun Baton | 10 | 40 | Civil Protection |
| Alyx's Gun | 5 | 3 | Alyx |
| Annabelle | ? | 40 | Grigori |
Taking damage[edit]
Players and NPCs take damage in the same way, including headshots. Headshots multiply the normal damage by 3. Headshots can be performed only with guns on humanoid NPCs or the player.
This table shows how many body hits/shots with each weapon are required to kill specific NPCs:
| NPC | Crowbar | Pistol | Magnum | SMG | SMG Grenade | Pulse Rifle | Shotgun | Shotgun (double shot) | Crossbow | Grenade | RPG |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Civil Protection (simple) | 3 | 6 | 1 | 7 | 1 | 4 | 1 | 1 | 1 | 1 | 1 |
| Barnacle | 4 | 7 | 1 | 9 | 1 | 5 | 1 | 1 | 1 | 1 | 1 |
| City Scanner | 3 | 6 | 1 | 8 | 1 | 4 | 1 | 1 | 1 | 1 | 1 |
| Manhack | 3 | 5 | 1 | 7 | 1 | 4 | 1 | 1 | 1 | 1 | 1 |
| Headcrab | 1 | 2 | 1 | 3 | 1 | 2 | 1 | 1 | 1 | 1 | 1 |
| Zombie | 5 | 10 | 2 | 13 | 1 | 7 | 1 | 1 | 1 | 1 | 1 |
| Fast Headcrab | 1 | 2 | 1 | 3 | 1 | 2 | 1 | 1 | 1 | 1 | 1 |
| Fast Zombie | 5 | 10 | 2 | 13 | 1 | 7 | 1 | 1 | 1 | 1 | 1 |
| Poison Headcrab | 4 | 7 | 1 | 9 | 1 | 5 | 1 | 1 | 1 | 1 | 1 |
| Poison Zombie | 18 | 35 | 5 | 44 | 2 | 22 | 4 | 3 | 2 | 2 | 2 |
| Overwatch Soldier | 5 | 10 | 2 | 13 | 1 | 7 | 1 | 1 | 1 | 1 | 1 |
| Antlion | 3 | 6 | 1 | 8 | 1 | 4 | 1 | 1 | 1 | 1 | 1 |
| Antlion Guard | 50 | 100 | 13 | 125 | 5 | 63 | 9 | 6 | 5 | 4 | 5 |
| Civil Protection | 4 | 8 | 1 | 10 | 1 | 5 | 1 | 1 | 1 | 1 | 1 |
| Overwatch Elite | 7 | 14 | 2 | 18 | 1 | 9 | 2 | 1 | 1 | 1 | 1 |
This table shows how many headshots with each gun are required to kill specific NPCs:
| NPC | Pistol | Magnum | SMG | Pulse Rifle | Shotgun | Shotgun (double shot) |
|---|---|---|---|---|---|---|
| Civil Protection (simple) | 2 | 1 | 3 | 2 | 1 | 1 |
| Zombie | 4 | 1 | 5 | 3 | 1 | 1 |
| Fast Zombie | 4 | 1 | 5 | 3 | 1 | 1 |
| Poison Zombie | 12 | 2 | 15 | 8 | 2 | 1 |
| Overwatch Soldier | 4 | 1 | 5 | 3 | 1 | 1 |
| Civil Protection | 3 | 1 | 4 | 2 | 1 | 1 |
| Overwatch Elite | 5 | 1 | 6 | 3 | 1 | 1 |
Note that in both tables, shotgun hit counts are calculated as if all the pellets hit and explosive weapons hit counts are calculated as if it was a direct hit.
