Warlords

Warlords is an arcade game released by Atari, Inc. in 1980. The game resembles a combination of Breakout and Quadrapong (an early Atari arcade game) in the sense that not only can up to 4 players play the game at the same time, but also the "castles" in the four corners of the screen are brick walls that could be broken with a flaming ball. (wikipedia)