in the early '90s Theo worked for Arcade Records in Holland and created the biggest Hardcore compilation in the world ever, (Thunderdome)
Theo and Arcade sold more than 2.000.000 copies worldwide, later on Theo signed a production deal with Master Maximum Records, a label together with Charly Lownoise. Later on they scored world wide hits with there debut single, "Wonderful days" and sold millions of records. Eleven hit singles followed.