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