Computer Science vs Information Systems

whats the difference between computer science and computer information systems?  Lets say i want to be a game programmer which course would be good for me computer science or information systems?

>>13
If you want to become a decent programmer, study CS, and do not think for a second about not reading SICP. And game programming is a competitive business that requires solid programmers.

Information systems is about discovering business logic to develop and deploy multi-tier turnkey mission-critical scalable five-nines Web 2.0 AJAX-based XML object-oriented enterprise business solutions that create synergy between your business departments and allow your business to maximize your profits by lowering TCO through customer satisfaction.