The Core War Colosseum is a MARS for the PC written by William R Buckley and published by AMRAN. The first issue of The Core War Newsletter (March 1987) advertised The Core War Colosseum for $12.95, or $10.95 for subscribers and ICWS members.

The Core War Colosseum supports the CWS'86 and CWS'88 Redcode standards.

The Core War Colosseum title screen The Core War Colosseum core view