Wikipedia
Taistelupetankki ( Finnish for "combat pétanque") is an outdoor sport game based on pétanque, developed in Finland in 1999. Taistelupetankki is played with the same equipment as pétanque, but it can be played in more diverse terrain.
In the game, a player (or a team) has two metal balls. On his/her turn, the player tries to get at least one of his/her balls closest to the jack. There are two ways to get one's ball closest to the jack: try to throw one's ball close enough in the first place, or try to knock an opponent's ball or the jack off with one's own ball. A popular tactic is to use one ball to knock an opponent's ball off and the other to get closest to the jack. If a player doesn't get even one of his balls closest to the jack on his/her turn, he/she drops out of the game. The game continues until only one player remains.
Taistelupetankki players describe the game as "continuing where pétanque left off".