Operation Green is a gritty action game played from a isometric perspective similar to the original games with a World War 2-esque setting. The game was released for the Game Boy Advance in 2001.
This time, the player takes control of a unnamed green soldier during what appear to be the beginning stages of the Plastic World War. This title is set almost exclusively in the Plastic World and the player fights throughout enemy bases, ruined cities, jungles and finally an underground base to prevent the activation of a Tan superweapon. There are a few vehicles available to drive. However, vehicles have a limited amount of fuel. Regarded as the best Army Men on a portable system.