Longtime Slashdot reader sfraggle writes: Biplane shoot-'em up, Sopwith, is celebrating 40 years today since its first release back in 1984. The game is one of the oldest PC games still in active development today, originating as an MS-DOS game for the original IBM PC. The 40th anniversary site has a detailed history of how the game was written as a tech demo for the now-defunct Imaginet networking system. There is also a video interview with its original authors. "The game involves piloting a Sopwith biplane, attempting to bomb enemy buildings while avoiding fire from enemy planes and various other obstacles," reads the Wiki page. "Sopwith uses four-color CGA graphics and music and sound effects use the PC speaker. A sequel with the same name, but often referred to as Sopwith 2, was released in 1985." You can play Sopwith in your browser here.

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