Good game - finished both campaigns. Only problem is that difficulty does not scale with each level. Becomes mundane after quests are completed; even at extreme level.
Why would you stop playing a game just because it doesn't have achievements? I guess you play a lot of games you don't like just to get achievements. Why not play them because you enjoy them.
You do not get an imaginary number when you divide by zero, you get infinity. An imaginary number is a number whose square is less than or equal to zero, and is thus not caused by a division by zero calculation.