Infinity Ward Are Very Much Focused On Quality Rather Than Quantity With Modern Warfare 2.

When asked why they opted for just two players in Modern Warfare 2's co-op mode, spokesman Robert Bowling concluded, "Two player seemed to be the magic number for co-op. That's when it stayed really fun and intense without becoming a clusterf**k of things."

Bowling also allayed fears about the single player campaign by confirming Infinity Ward are "crafting a very specific experience" and don't want to "ruin that by cramming co-op into it".