bullet sponge enemy
Any enemy in the entire trilogy with the exception of bosses and djinns/brutes in Uncharted 3 (max difficulty) can be killed with one-two bullets to the head after getting their helmets off (another 1-2 bullets depending on the weapon), engaged on melee or instakilled from the back.
You and everybody who complains about the games being "bullet spongy" are either doing it wrong or plain bad at videogames. Clearly overly armored chest? Better keep shooting at it and blame developers for forcing me to aim fo the head or find the weapon that can kill them in two hits. How dare they add variety and complexity to the gameplay?! What a trash game.
The shit-easy platforming complains are legit though; it's embarrassingly oversimplified. As a TPS it's a fantastic game both single and multiplayer.