Here is the full list of all 16 8-Bit Bayonetta achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
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Killed by a flying angel
Single jump 30 times
Kill a land angel
Killed by a land angel
Die without scoring
Double Jump lots during a game
Dodge multiple axe attacks in 1 game
Maintain a very high rate of fire
Reach a score of 5000
Finish with a score between 8000 and 13000
Reach a score of 13000 or more
Fire 1000 bullets
Finish with a very specific score
Launch the game multiple times
Kill a lot of angels