Description:

Core War is a game in which two or more virus-like programs fight
against each other in a simulated memory space or core. Core War
programs are written in an assembly language called Redcode which is
interpreted by a Core War simulator or MARS (Memory Array Redcode
Simulator). The object of the game is to prevent the other program(s)
from executing. For more information about Core War check out the
usenet newsgroup rec.games.corewar and its FAQ list
ftp://rtfm.mit.edu/pub/usenet/games/corewar-faq