CoreWar Plus

CoreWar Plus is an enhanced version of the original Core War game, with an expanded GUI, editor, and more available commands. If you're interested in programming, you may want to take a look at Core War. In this game, you write a program which then duels against programs written by other people. There seem to be several different versions of this program for different operating systems. You must design your program to write to memory and destroy your opponent's code in the same shared memory area.