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