Counterattack
noun, verbal noun
A reverse attack is a counterattack.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
パックマンは、追ってくるモンスターを逆襲して食べ始めた。
Pac-Man counterattacked and started eating the monsters that were chasing him.