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