Not just Finland, Liero was big in Estonia, too! I remember I got Liero on a floppy disk from a friend early 00's and ran it on my Win98. Good ol' days. Terep2 was another great game.
Brazil too. Used to play this with family and friends, especially one of my cousins. Also played it quite a few times with friends in computer classes. Everyone could play using the same keyboard at the same time, it was crazy.