
Borderlands 2
Fire Damage or Incendiary Damage is very effective against Flesh Targets.
Normal Mode:
+50% Damage against Flesh Targets.
-25% Damage against Shielded and Armored Targets
True / Ultimate Vault Hunter Mode:
+75% Damage against Flesh Targets.
-60% Damage against Shielded and Armored Targets
A Bandit (Flesh) in UVHM, would get 175 Damage with 100 Damage Weapon.
A Loader (Armored) would get 40 Damage.
The Fire Status Effect lasts for 5 Seconds.
It deals damage (1/3 ( ±5% ) of its Status Effect Damage) 3 times per second.
Fire Specific Weapons:
Sawbar, Seraphim, Toothpick, Greed, Logan's Gun, Tinderbox, Pyrophobia, World Burn, Blockhead, Heart Breaker, Teeth of Terramorphous, Good Touch, Hellfire, Infection Cleaner, Nirvana, Hot Mama, Longbow, Volcano
Fire Specific Gear:
Antifection, Breath of Terramorphous, Contraband Sky Rocket, Fire Bee, Fire Storm, Fireball
Other Fire Items:
Flame of the Firehawk, Hide of Terramorphous, Slayer of Terramorphous Class Mods, Bone of the Ancients
Borderlands 3
Normal Mode:
+50% Damage against Flesh Targets.
-30% Damage against Shielded and Armored Targets
True Vault Hunter & Mayhem Mode:
+75% Damage against Flesh Targets.
-50% Damage against Shielded and Armored Targets
Can cause the Ignite Status Effect that lasts for 5 Seconds.
It deals damage (1/3 ( ±5% ) of its Status Effect Damage) 3 times per second.
More Elements

Cryo

Corrosive

Radiation
