Guadalcanal Campaign is a 1982 computer wargame developed by Gary Grigsby and published by Strategic Simulations, Inc. (SSI). It was Grigsby's first released game and has been cited as the first monster wargame made for computers. Guadalcanal Campaign was a commercial and critical success that helped to establish Grigsby in the game industry. Grigsby followed it with Bomb Alley. Continuing to work with SSI, he went on to become a prominent name in the computer wargame field, releasing 23 games with the company by 1996.