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.
View the final credits.
All Pods upgraded to the highest level.
All Pod programs obtained.
1 hour played with 9S in a certain state.
All weapons upgraded to the highest level.
Emil destroyed.
50 machine lifeforms destroyed by remote control.
50 machine lifeforms destroyed with berserk mode.
The place of memories has been visited.
Achieve 9S's ending.
10 friendly machine lifeforms destroyed.
80% of all quests completed.
Any animal ridden for 5 kilometers.
100 machine lifeforms destroyed by hacking.
Materials gathered at a hidden harvest point 10 times.
80% of all archives found.
Achieve A2's ending.
Watch the final moments of Devola and Popola.
Stop all resource recovery units.
80% of all unit data unlocked.
Grant Pascal's final request.
20 different kinds of fish caught.
All Pods found.
Control A2 for the first time.
Watch 2B die.
Achieve ending B.
Any weapon upgraded to the highest level.
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.
Have 100 bodies collected.
Emil's shop used for the first time.
At least 100,000 G in possession.
Complete the forest castle.
Have your body collected.
Complete the alien ship.
Complete the amusement park ruins.
Complete the desert area.
Complete your first quest.
Arrive at the city ruins.
2B's secret discovered 10 times.
Stare into space from the Bunker.