Looks like Iron Hide team likes metal - "Ride the lighting" and "Thunderstruck" at tesla coil upgrades, "I am not afraid of the dark" (Fear of The Dark?) "Why So Serious?" (epic Lars Urlich's question) while fighting the Dark Wizard. Maybe there's more, that I don't discovered yet :D
 "Kingdom Rush"){kind=icon}
 "Super Crazy Guitar Maniac Deluxe 2"){kind=icon}