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