 Hagen then joined Strømsgodset, where he scored 28 goals in 163 domestic league games, only interrupted by two seasons for Oslo club Vålerenga who he made 8 goals in 30 domestic league games for.His next move, to Danish side Herfølge during the winter of 2005, was controversial.Hagen could not prevent Herfølge being relegated to the Danish 1st Division, and he used a clause in the contract to leave the club after only 13 games.