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