Defeating Arok:
     Run to Arok and stand in front of him, but turned slightly to his
right. Hit him with weapon #2 when he is in the air, this is better if
he  is  in  his highest position, then run quickly forwards ([Shift] +
[Cursor Up]. You will pass him by and he will miss his punch. You will
end up behind him, from where you can hit him safely. In three or four
times  you can kill him very easily. Run quickly to the place in which
he appears.