Representing Czechia, Kosťa is active in the Age of Empires II scene. With 1 matches played, Kosťa is an experienced Age of Empires II player. The majority of Kosťa's matches are in the unranked mode.

Kosťa has never ventured into ranked gameplay in Age of Empires II. When selecting a civilization, Kosťa goes with Celts about 100.0% of the time. A 100.0% win rate in the pocket role over 1 games is Kosťa's best.