Representing Netherlands, Koos is active in the Age of Empires II scene. To date, Koos has played 339 matches in Age of Empires II. Koos prefers the ranked random map team game mode.

Teutons is the go-to civilization for Koos, making up 13.6% of their picks. Across 46 games, Koos wins 47.8% of the time when playing Teutons. Across 54 games on Black Forest, Koos has a 64.8% win rate.

As flank, Koos has won 49.2% of their 130 matches. Koos plays at a 1145 rating in RM Team. Playing RM 1v1, Koos achieves a 33.3% win rate across 12 matches.