Core War

Core War is a game played by two or more programs written in an assembly language called Redcode and run in a virtual computer called MARS (Memory Array Redcode Simulator). The object of the game is to cause all processes of the opposing program to terminate, leaving your program in sole possession of the machine. There are Core War systems available for most computer platforms. Redcode has been standardized by the ICWS, and is therefore transportable between all standard Core War systems.