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