IGN: This Is Vegas Blog: Get The Party Started

By Andre Maguire:

"A big challenge in open world game development is getting all the game play elements to play nice with each other. This is Vegas! focuses on 4 main game play pillars: Racing, Fighting, Gambling and Partying. But… really this is just a foundation. Certainly we've spent quite a bit of time developing these parts of the game but, we are Open world! It doesn't just end there. Cross pillar compatibility is where it gets interesting".