This work is motivated by the challenge to
improve player rating systems in Multiplayer Online Battle
Arena (MOB A) games by incorporating the application context,
as opposed to calculating the player rating based solely on the
match outcome (winning or losing). The application context is
modeled by using a set of parameters describing the players' ingame
accomplishments and contributions to the team, as well as
the performance of the team as a whole. The proposed
application context based rating algorithm functions as an
extension of the underlying (unmodified) player rating algorithm
by adjusting the rating update step and can thus be applied for
different rating systems in MOB A games. We evaluate the
proposed algorithm by using a dataset comprising over 400,000
matches of the MOBA game Heroes of Newerth.