Here is the full list of all 47 NieR:Automata achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
All endings achieved.
All weapons upgraded to the highest level.
All Pods upgraded to the highest level.
Emil destroyed.
1 hour played with 9S in a certain state.
50 machine lifeforms destroyed by remote control.
50 machine lifeforms destroyed with berserk mode.
80% of all archives found.
All Pod programs obtained.
80% of all quests completed.
20 different kinds of fish caught.
Any animal ridden for 5 kilometers.
Materials gathered at a hidden harvest point 10 times.
2B's secret discovered 10 times.
Any weapon upgraded to the highest level.
10 friendly machine lifeforms destroyed.
80% of all unit data unlocked.
The place of memories has been visited.
All Pods found.
Achieve 9S's ending.
View the final credits.
Achieve A2's ending.
Watch the final moments of Devola and Popola.
Stop all resource recovery units.
Grant Pascal's final request.
At least 100,000 G in possession.
Control A2 for the first time.
Watch 2B die.
Have 100 bodies collected.
Achieve ending B.
100 machine lifeforms destroyed by hacking.
80% of all plug-in chips collected.
Play your first hacking game.
Achieve ending A.
Complete the abandoned factory.
Complete the copied city.
Complete the flooded city.
255 enemies destroyed using a flight unit.
Emil's shop used for the first time.
Complete the forest castle.
Complete the alien ship.
Complete the amusement park ruins.
Complete the desert area.
Complete your first quest.
Have your body collected.
Arrive at the city ruins.
Stare into space from the Bunker.