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