DECWAR is a multiplayer computer game first written in 1978 at the University of Texas at Austin for the PDP-10. It was developed from a lesser-known two-player version, WAR, adding multi-terminal support for between one and ten players. WAR and DECWAR are essentially multiplayer versions of the classic Star Trek game, but with added strategic elements. The game was later used, by scrubbing copyright notices and replacing them, as MegaWars on CompuServe and Stellar Warrior on GEnie.