What year did WizKids release Shock the Turtle? Could it have been in a DC rulebook?
Shock the Turtle and King of the Hill are more like generic scenario types and i don't believe they have ever reprinted the rules for them in any of the official rules books.
King of the Hill is pretty self explanatory, get to the top of the hill stay there, win! Shock the Turtle has been around under one name or another in organized games, basically think of it as a small reminder to continue to advance towards your enemy(s) or be forced to pay the consequences