Complex sentence: The original game was released as "Duke Nukem" in 1991 as a two dimensional platform game, which was IBM PC compatible, and featured 320 × 200,16-color EGA graphics with vertical and horizontal scrolling.
Split into simpler sentences: The original game was released as "Duke Nukem" in 1991 as a two dimensional platform game. The game was IBM PC compatible, and featured 320 × 200,16-color EGA graphics with vertical and horizontal scrolling.