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.
All Pods upgraded to the highest level.
20 different kinds of fish caught.
1 hour played with 9S in a certain state.
2B's secret discovered 10 times.
50 machine lifeforms destroyed with berserk mode.
Have 100 bodies collected.
80% of all archives found.
All Pod programs obtained.
Materials gathered at a hidden harvest point 10 times.
All weapons upgraded to the highest level.
80% of all quests completed.
Emil destroyed.
80% of all unit data unlocked.
100 machine lifeforms destroyed by hacking.
50 machine lifeforms destroyed by remote control.
The place of memories has been visited.
All Pods found.
10 friendly machine lifeforms destroyed.
Achieve 9S's ending.
View the final credits.
Any animal ridden for 5 kilometers.
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.
80% of all plug-in chips collected.
Achieve ending B.
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.
Have your body collected.
Complete your first quest.
Arrive at the city ruins.
Stare into space from the Bunker.