While playing the space shooter minigame on the Hyperian, Lost Viking, open the chat box with ENTER and enter these codes for the desired effect. He is hostile and will attack your units when encountered. On 'The Devil's Playground,' Redstone III (planet), head to the bottom right corner of the map to locate Diablo, surrounded by lava. Works on all difficulties but good luck doing it on hard or brutal. If you click him 3 times the words 'Secret 3.2.1' will appear and then the marauder will disappear. On the mission Zero Hour, if you attack the Zerg base to the north/northwest you can find a nuetral Marauder. You can unlock the following songs for the jukebox by performing the actions below.
Currently this only seems to work with ground units.
Select units and press Enter, then type the command /dance to make them dance.
