The M18 "Black Cat" is a premium American light tank. It was introduced in Update 1.49 "Weapons of Victory" as a premium pack vehicle and was eventually removed from the store after War Thunder's 6th Anniversary sale, but was later reintroduced for War Thunder's 7th anniversary as a premium purchasable in-game with Golden Eagles.

The M18 "Black Cat" is a gift version of the M18 Hellcat, with little difference in performance.

The M18 "Black Cat" compensates the lack of anti-tank capability on U.S vehicles by having access to a 76 mm gun with APCR ammunition. This makes the M18 able to fight off many of the common vehicles it could face like the Panther D, Tiger H1, KV-1, KV-85, and IS-1.

Unlike the other tank destroyers known in the game, the M18 "Black Cat" has access to a 360° traversable turret, allowing players to have a greater arc of fire than a typical casemate tank destroyer like the StuG III, but at the expense of a slightly higher profile. Americans tank destroyers also have very high manoeuvrability compared to other nation's tank destroyers, allowing it to flank the enemy.