The Battle Cats is a free-to-play tower defense video game developed and published by PONOS Corporation for iOS and Android, originally released in Japan under the name Nyanko Great War (にゃんこ大戦争, Nyanko Dai Sensō). The Battle Cats debuted on the Japanese iOS App Store in November 2012, with an improved version being released globally on the 17th of September, 2014.

This game mainly consists of selecting teams of unlockable "Cats" and sending them onto a 2D battlefield to defend the Cat Base and defeat the enemy base. Many of these Cats do not resemble typical cats, featuring unusual proportions and sometimes being equipped with external objects such as weapons or machines.