o.zumstein is among the Age of Empires II players representing China. To date, o.zumstein has played 157 matches in Age of Empires II. o.zumstein is most active in the unranked ladder.

o.zumstein sticks to unranked or casual play, having never entered ranked. In the pocket position, o.zumstein has a 28.0% win rate across 25 games. o.zumstein plays at a 796 rating in RM 1v1.