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