 In the classic board game "Risk", the U.S. version uses ascending card trade-in values (4 additional reinforcements, then 6,8,10,12,15,20,25...), while the European version uses set card trade-in values (Infantry-4, Cavalry-6, Cannon-8, One of each-10).In "Risk II", both versions have the option of using ascending or set trade-in values, and also an additional option of ascending by one (4,5,6...), which is a compromise between ascending and set.Originally the MSN Gaming Zone supported free online play for "Risk II", though it ceased support of the game on January 31, 2006.