Hi Felecia,
Here's a suggestion. One year, we played a game called Family Trivia. Ten or fifteen family history questions were presented. Each table of 10 people had to collaborate within a time frame to answer the questions. The table who had the most correct answers won prizes. You can throw in some "tricky" or not-so-easy questions to make it even more challenging and fun. Also, mix up the family; have family members of different branches to come together. In other words, don't have all of Uncle Joe's children at one table, all of Aunt Jane's children at one table, and all of Uncle Jim's children at another. Let each table contain members of each represented family branch so that people can become more acquainted with each other in a fun setting.

Good Luck!

Mel