This is a list of medals that have been obtained by at least one person on the NG Top Medal Points list. As such, it might be incomplete. If you know of an obtainable medal that is not in this list, please let us know about it. The game names used below are the ones that appear on a user's medal list page, not the game's page.

GameMedalPoints
Stealing the DiamondFail Champion100
Obscure Medal
Aggressive Ending50
Epic Ending
Failtastic
Undetected Ending
0110001010
Like a D6
BUNP5
It's a Joke Guys
tldr
GameMedalPoints