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