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