How is Dark Messiah connected to Heroes of Might and Magic?

No, it wasn't like that!
V: Oh, what guests! Railag, right? Can I have a word with you?
R: My friends call me Railag, and for you, I'm Agrail.

Added 10 minutes later

FALSE! He's the smartest one there! A hundred times more clever than Kha-Belekh! Love isn't chosen with the head, but with the heart! I love one person, even though I know I'm not his type and that my parents aren't very happy about it, but I love him. Although, not everyone can understand Agrail's love tragedy, only those who have experienced unrequited love themselves...