Here is the full list of all 19 Angry Video Game Nerd Adventures achievements.
Die 1000 times
Collect 200 1ups
Find all S*** Pickles
Find all the cameos
Find all playable characters
Drink 100 beers
Found Matthew Lentz
Find Craig
Enter a cheat code
Beat the game on "Normal" or higher
Die 100 times
Ride the Fire shark
Kill Santa
Kill Naggi
Beat the game on "Old School" or higher
Beat the game on "Hard as Balls" or higher
Beat the game on "Impossible" or higher
Beat the game on "YOLO"
Beat the game over Halloween weekend on Normal or Higher difficulty