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