As either Robo or Mobo, players attempt to steal all the treasure in the building and then escape to the next level. Players can also temporarily knock out guards that get in the way.
A number of significant changes were made to the European version of the Genesis/Mega Drive port; the brothers are named Mike and Spike, and instead of thieves they are 'investigators', who receive a letter from an anonymous businessman who wants them to test the security of his various establishments.
The brothers were included in Sonic & Sega All-Stars Racing. Their unique vehicle is the Get-a-Way Wagon, and their All-Star Move is Blimp Strike, in which the shorter brother rises up to a blimp above the wagon and lobs bombs at the racers behind the brothers.