Here is the full list of all 19 Angry Video Game Nerd II: ASSimilation achievements.
Collected all cartridges in a world
Found the Uber Scope
Found all the armor
Found the Swear'n'Scout
Found the cape
Found the Turbo Pad
Defeated Death Mwauthzyx
Completed the sexforce
Dropped 100 F-Bombs
Defeated Board James
Found the Glove of Power
Collected all cartridges in a level
Perfected a stage (No deaths!)
Endured the tutorial
Collected every cartridge in the game!
Perfected all stages
Beat Old School difficulty
Beat Hard as Balls difficulty
Beat F***ing Impossible difficulty