Original sentence: Kesmai is a game developer and online game publisher, founded in 1981 by Kelton Flinn and John Taylor.The company was best known for the  combat flight sim Air Warrior, the first graphical MMOG, launched in 1987.The company's studios were subsequently closed, and Kesmai today is a game brand within Electronic Arts but not a separate operation
Edited sentence: Kesmai is a pioneering game developer and online game publisher, founded in 1981 by Kelton Flinn and John Taylor.The company was best known for the ground-breaking combat flight sim Air Warrior, the first graphical MMOG, launched in 1987.The company's studios were subsequently closed, and Kesmai today is a game brand within EA but not a separate operation