The first game in the series, WWF SmackDown! had a clear cut system for moves such as combining an arrow key with the circle button for grappling and moves and combining an arrow key with the X button for striking moves. Most of the later games, from WWF SmackDown! 2: Know Your Role to WWE SmackDown vs. Raw 2006 used the aforementioned control scheme. When WWE SmackDown vs Raw 2007 was released, new game mechanics were introduced, in which a new control scheme altered the grappling system of the game, called "Ultimate Control moves."