With roots in Iceland, Costner takes part in Age of Empires II. Costner has competed in 12 Age of Empires II matches so far. The majority of Costner's matches are in the unranked mode.

So far, Costner has not participated in ranked games. Data shows Costner selecting Ethiopians as their civilization 33.3% of the time. The stats show Costner at their best in the flank role—100.0% win rate in 1 matches.