Those three games are all 100+ hours of pure fun. Borderlands is just plain dumb fun, both in single user and co-op. Tiger Woods 12 is not the best in the series, but it is the first time the Masters is included in the franchise so it was well worth it. Assassin's Creed Brotherhood was AWESOME.
The challenge is at http://sherryturley.blogspot.com/2011/07/anyone-up