Oh, so many good games from that year.
I voted Elite, since it's the game that I really enjoyed the most in the long run, plus it is grandaddy of open world games.
Games that I remember being most played in arcades from that year are 1942 and Punch Out - though, tbh, I don't recall Duck Hunt being in local arcades.
Game that I remember the most from that year is Montezuma's Revenge (Panama Joe), early example of Metroidvania type games - made by 16 year old kid, no less.