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