Abstract
Players of online gaming communities such as Steam, Xbox Live, and the PlayStation Network may have trouble finding people to play with as evidenced by the popularity of looking for group (LFG) services. This paper studies friend recommendation systems as a possible solution to alleviate this problem because a high quality friend list can provide a higher chance for the player to find people to play with. An online survey of video game players was conducted to study the need for friend recommendations in gaming communities and how players build their friend lists. The results showed that a sizable portion of players experienced some sort of difficulty finding people to play with and players add friends through a diverse set of possible sources. As the first step to build a friend recommendation system for gaming communities, we tested ten common link prediction similarity indices on a dataset collected from the Xbox Live network containing over 42 million unique users. The results showed that a friend recommendation system-based solely on network topology features did not perform well. Future research should incorporate other information such as player profiles to improve the friend recommendation performance.
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