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