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