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.
1 hour played with 9S in a certain state.
All weapons upgraded to the highest level.
80% of all plug-in chips collected.
The place of memories has been visited.
2B's secret discovered 10 times.
50 machine lifeforms destroyed with berserk mode.
All Pods upgraded to the highest level.
10 friendly machine lifeforms destroyed.
80% of all archives found.
20 different kinds of fish caught.
All Pod programs obtained.
All Pods found.
Emil destroyed.
Any animal ridden for 5 kilometers.
Materials gathered at a hidden harvest point 10 times.
Any weapon upgraded to the highest level.
80% of all quests completed.
Achieve 9S's ending.
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.
50 machine lifeforms destroyed by remote control.
Control A2 for the first time.
Watch 2B die.
Achieve ending B.
100 machine lifeforms destroyed by hacking.
Play your first hacking game.
Achieve ending A.
Complete the abandoned factory.
Complete the copied city.
At least 100,000 G in possession.
Have 100 bodies collected.
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.
Have your body collected.
Complete the amusement park ruins.
Complete the desert area.
Complete your first quest.
Arrive at the city ruins.
Stare into space from the Bunker.