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