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.
1 hour played with 9S in a certain state.
20 different kinds of fish caught.
50 machine lifeforms destroyed with berserk mode.
50 machine lifeforms destroyed by remote control.
All Pods found.
100 machine lifeforms destroyed by hacking.
All Pods upgraded to the highest level.
All Pod programs obtained.
80% of all plug-in chips collected.
80% of all quests completed.
All endings achieved.
The place of memories has been visited.
All weapons upgraded to the highest level.
Emil destroyed.
80% of all archives found.
Any animal ridden for 5 kilometers.
10 friendly machine lifeforms destroyed.
View the final credits.
Achieve A2's ending.
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.
Any weapon upgraded to the highest level.
Materials gathered at a hidden harvest point 10 times.
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.
At least 100,000 G in possession.
Complete the forest castle.
Have 100 bodies collected.
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.