2. What are you talking about? gamedevmap lists 17 game companies in Denmark.
He can also quite easily get a job in pretty much any other EU nation, EU citizens don't need permits to work in other EU nations and if he lives in for example copenhagen he can work in Malmö/Sweden where Massive Entertainment have their office (and they're currently hiring) without having to relocate (trains go between the two cities every 30 minutes or so) and quite a few danish cities are very close to germany as well (Allthough i don't know if there is any big german studio close to the danish border)