|Game Series||Mercenaries (series)|
|First Appearance||Mercenaries: Playground of Destruction|
|Age:|| 31 (Mercenaries: PoD)
34 (Mercenaries: WiF)
|Voice Actor(s):||Peter Stormare|
|Trademark:||Mohawk and glasses|
Mattias Nilsson is a main character in the Mercenaries (series). He is was born in Sweden. He can speak Russian, English, and Sweedish. He joined the Sweedish army at 17 years old.