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