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