  Achievement systems have been actively adopted in gaming platforms to
maintain players' interests. Among them, trophies in PlayStation games are one
of the most successful achievement systems. While the importance of trophy
design has been casually discussed in many game developers' forums, there has
been no systematic study of the historical dataset of trophies yet. In this
work, we construct a complete dataset of PlayStation games and their trophies
and investigate them from both the developers' and players' perspectives.
