Basically, it's a silly Role Play played seriously. Sort of like we're playing an 80's movie, I suppose. 

Some of the villains include Super Hitler (From a webcomic), Hitler Rant Parody Hitler, Arjen Rudd (Lethal Weapon 2), Slender Man, Jeff the Killer,etcetera. 
You could choose to play Ronald Reagan, riding a dinosaur and brandishing a rifle. You could play Benjamin Franklin and use lightning based powers! You could play Abraham Lincoln Vampire Slayer! Hell, you could even be Super Hitler, Hitler Rant Parody Hitler, Slender Man, Jeff the Killer, etcetera!