  Player ranking can be used to determine the quality of the contributions of a
player to a collaborative community. However, collaborative games with no
explicit objectives do not support player ranking, as there is no metric to
measure the quality of player contributions. An implicit objective of such
communities is not being disruptive towards other players. In this paper, we
propose a parameterizable approach for real-time player ranking in
collaborative games with no explicit objectives. Our method computes a ranking
by applying a simple heuristic community quality function. We also demonstrate
the capabilities of our approach by applying several parameterizations of it to
a case study and comparing the obtained results.
