I'll try too with the ones cloud-jak couldn't name some of them are unknown to me too though...
1st line: Harvey "Two-Face" Dent, Carnage, Kick-ass, Rorschach. 4th line: my guess is that most are famous youtubers/flash designers. Then you have the little Newgrounds tank guy, Dad, a guy from Rage and Pico. 8th line: Gordon Freeman, a combine soldier, Master Chief, I'm... not sure... Alucard?, Ezio, Chell, zombie headcrab, the Dovahkiin, Kratos. 9th line: Sai. 10th line: Darth Vader, Emperor Palpatine, Darth Maul, Luke Skywalker, Yoda, Han Solo, Chewbacca 11th line (skyrim? seriously?): Frodo, Sam, Gandalf the Grey, Aragorn, Gimli, Legolas, Gollum, Saruman the White, the Sorcerer King (slightly too lazy for last names on this one ) 12th line: seriously can't remember the movie (never seen it) but I recognize those two guys, Leonidas, Jigsaw?, Neo, V. And the Shinigami is named Ryuk
Pretty nice, it's not easy to make them all regognizable. Good work
*From left to right~* First line: Superman, Spiderman, Batman, Joker, Dunno, This one looks like some ecil on A Spiderman movie, Darkwing Duck, Iron Man, Thor, Dunno, Dunno, THE DUCK AVENGER!!. second line: Pikachu, Squirtle, Charmander, Mewtwo, Lucario, Snorlax. Third line: Sonic, Mario, Bowser, Samus, Meta Knight, Ike, Link. Fourth line: Those two looks like from smosh, Nyancat, Dunno the rest. Fifth line: Homer Simpson, Peter, Bender, Dunno, Dunno, Eric Cartman, Stan Marsh, Kenny McCormick, Kyle Broflovski, Panty, Stocking. Sixth line: Steve, Zombie, Creeper, Enderman, Zombie Pigman. Seventh line: Rainbow Dash, AppleJack, Fluttershy, Twilight Sparkle, Rarity, Pinkie Pie, Derpy hooves, Pon3, Princess Luna. Eighth line: WHO ARE THOSE PEOPLE? oAo I never seen them before! Ninth line: Naruto, Sasuke, Sakura, Dunno, Kakashi, Garra, Itachi, Dunno, Dunno. Tenth line: Star wars~ I dunno the characters names~ >< 11th line: Skyrim? omo I dunno >_<;; 12th line: Jack the skeleton, Avatar, Woody, Buzz lightyear, dunno the rest of them. 13th line: Aang, Katara, Sokka, Toph, Light, L, Shinigami.