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