Representing Switzerland, Sepp-Meier is active in the Age of Empires II scene. To date, Sepp-Meier has played 15 matches in Age of Empires II. Sepp-Meier prefers the unranked game mode.

Sepp-Meier has never ventured into ranked gameplay in Age of Empires II. A 40.0% pick rate makes Byzantines the top civilization choice for Sepp-Meier.