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