Grey Dog Software announces the release of World of Mixed Martial Arts 4, the latest installment in their sports management series. If you are grappling with a decision about this, there is a free playable demo that allows you to sample three months of the in-game calendar to see what you think. Here's word: "Grey Dog Software announces the retail release of World of Mixed Martial Arts 4. WMMA4 includes numerous enhancements and improvements over WMMA3 including allowing multiple players (up to 8) the ability to control MMA organizations around the world, an enhanced scouting and player negotiation system, revamped fight engine and a more unpredictable and evolving fight environment."