Rat

Rats are common rodents, able to survive almost everywhere.

Tactics
The easiest enemy in the game mostly hanging around on the ground or swimming in the water. Just shoot with your Dual Pistols, and jump backwards when they get to close or you're on dry ground while they're floating on the water. They bite Lara and cause little damage but can cause her health bar to drop while continuously biting her.

Tomb Raider

 * Palace Midas
 * The Cistern
 * Tomb of Tihocan

Tomb Raider II

 * Venice
 * Bartoli's Hideout
 * Opera House

Tomb Raider II: The Golden Mask

 * Fool's Gold
 * Furnace of the Gods

Tomb Raider III

 * Thames Wharf
 * Aldwych

Tomb Raider: The Last Revelation
Appears as animating object only in one of the Cairo levels. Not an enemy

Tomb Raider (2013)
They appear as animals that can be hunted throughout various locations on Yamatai like in The Last Revelation they are not enemies.