http://www.newgrounds.com/portal/view/611527

Here is a list of all the games. Special thanks go out to MatthewF and EdyKel. They added many games to the list.

Common Title
Level 1
First Row: Gradius, Batman, Super Mario Bros., Contra, Excitebike
Second Row: Metroid, Castlevania, The Legend of Zelda [note: "Legend of Zelda" doesn't work!], Mega Man, Punch Out

Level 2
First Row: Bionic Commando, Duck Tales, Final Fantasy, R.C. Pro-Am, Cobra Triangle
Second Row: Urban Champion, River City Ransom, Ninja Gaiden, Double Dragon, Kid Icarus

Level 3
First Row: Blaster Master, Bubble Bobble, Werewolf, Blades of Steel, Metal Gear
Second Row: Kirby's Adventure, Pro Wrestling, Clu Clu Land, Adventure Island, Mappy

Level 4
First Row: City Connection, Pac Man, Rad Racer, Mach Rider, Kung Fu
Second Row: Micro Machines, Bad Dudes, Baseball, Faxanadu, Jackal

Level 5
First Row: Cabal, Arkanoid, Tennis, Gumshoe, Robocop
Second Row: Galaga, Battletoads, Tetris, Klax, Crystalis

That's all for the Common Titles! Medal Get!

Unique Title

Level 1
First Row: Ghosts n Goblins, Kick Master, Rampage, Elevator Action, Spy vs Spy
Second Row: Metal Storm, Duck Hunt, Bomberman, Dig Dug, Captain America and the Avengers

Level 2
First Row: Karateka, Lode Runner, Popeye, Dr Mario, Adventures of Lolo
Second Row: Rygar, Maniac Mansion, Rush n Attack, Pinball, TwinBee

Level 3
First Row: The Goonies, B-Wings, Chip 'n Dale: Rescue Rangers, Ikari Warriors, Road Fighter
Second Row: Ice Climber, Antarctic Adventure, Binaryland, Journey to Silius, Scat

Level 4
First Row: Little Samson, Astyanax, Paper Boy, Shadowgate, Mighty Final Fight
Second Row: Sky Destroyer, Snow Bros, The Legend of Kage, Battle City, Circus Charlie

Level 5
First Row: Mickey Mouse, Tiny Toon Adventures, Pooyan, 1942, Balloon Fight
Second Row: Donkey Kong, Hogans Alley, Gyruss, Life Force, Shadow of the Ninja

That's all for the Unique Titles! More medals get!

Marathon

In this mode you see one screenshot and have to enter the name of the game you see.

Here is a screenshot of all the game pictures. You can use this in the Marathon mode, to look up the games. You can cross out those you already entered correctly.