Most of Costello's games take place on the ranked random map 1v1 ladder. Costello has a 49.4% win rate in RM 1v1 over 77 games. Costello represents Argentina in Age of Empires II with 116 matches under their belt.

Costello has reached 854 in RM 1v1. They win 54.5% with Lithuanians and 62.0% on Arabia.