Representing Hong Kong, alien21 is active in the Age of Empires II scene. The match count for alien21 in Age of Empires II stands at 24. alien21 dedicates most of their playtime to unranked.

The competitive ranked ladder remains unexplored by alien21. When selecting a civilization, alien21 goes with Italians about 16.7% of the time. A 50.0% win rate in the flank role over 2 games is alien21's best.