Highway Trouble (or HWYT, a.k.a. Metal Slug Mario: Highway Trouble) is a mario fangame that was originally released on December 25, 2009. Highway Trouble was inspired by the second level of an Xbox 360 game named Alien Honimid.
Highway Trouble 2 is the sequel of Highway Trouble.
An army of clones created by Bowser tries to take over the world by using all of the highway system of Mushroom World as a military routes. Mario/Luigi are the few who can stop them. Grab the latest technology imported into the Mushroom World and jump into the action!