Combat was designed by Atari, Inc. and first released for the Atari 2600 in 1977 and was the pack-in game for the system until 1982 (meaning: you got a Combat cartridge with the console, upon purchase).
It was one of the first home video games I ever played (probably the same for millions of others) and it enthralled me. Yes, Combat is very simple by today’s standards, but in 1977 it was a revelation and was much cloned by other developers.