I think the Regional Levequest and the Local Levequest achievement totals are separate, so for the 2000 achievement, I would imagine you did many as a group. I just checked my achievements and it seems I have 400 different ones already. I seriously need to play less even though they are pretty easy to get. I'm okay with the idea of making the achievements more noticeable in the game, but I hope its not like the word "Achievement Gained" in nice big letter with sparkly effects on top of my character. As for the math (2000/8)x1.5 (days of time per reset*)= 375 real days to achieve this feat without linking/sharing Levequests. The number of people who were mentioned to have the 2000 achievement are probably the only ones doing so many leves together regularly.