You can find all albums of OSI on this page.
OSI knows in genres Rock, Experimental.
Or site contains 12 albums of OSI.
Free (Deluxe Edition)
2021
Nordlige Runaskog (Deluxe Version)
2019
Uthuling Hyl
2017
Halls Of The Wolf
2016
Fire Make Thunder
2012
Blood (Limited Edition)
2009
Blood (Bonus Disc)
Blood
Re: Free
2006
Free (Limited Edition)
Office Of Strategic Influence
2003
Office Of Strategic Influence (Bonus CD)