And we have the first people we managed to complete the SP mode of Diablo III. As you may have guessed, these people come from Korea and they have managed to complete the game - in normal difficulty – in around 4-5 hours. Of course, these people are not ordinary people like most of us. Therefore, there is nothing to really worry about the game’s length. It’s a fact, though, that it will take you approximately a day or two to complete Diablo III in normal difficulty.
In case you’re wondering, there are already achievements for finishing each ACT in under an hour. So yeah, it’s ‘doable’.
Keep also in mind that the fun – in Diablo III – starts in the higher levels of difficulty and we can assume that those who have finished it have also rushed in and skipped much of the game’s content.