Diablo – Will Diablo III beta achievements persist into the retail release

Console commands do not affect achievements in Skyrim. I've used it to clip through places when I ended up falling and becoming stuck and still received achievements in the same session. I've also togged tgm on occasion while testing stuff and still received achievements after I finished testing without restarting my game.

Once you get past all the speculation, this thread seems to confirm that using console commands do not affect achievements at all.

Of note from that thread:

• One person got the buy a house achievement right after giving himself 5000 gold via additem.
• Another person still continued to receive achievements despite walking around with an max encumbrance weight of 5000 via modav.

AS @Krazer said in the comment of your question.

They are different, according to Bashiok (Blizzard Community Manager): twitter.com/#!/Bashiok/status/182153526925991937 The beta client will (naturally) have issues that will not be in the retail version. – Krazer

And Bashiok in his Twitter.

Aerisot ‏ @Aerisot @Bashiok If we already have the beta client, do we still need to download the retail client?

‏ @Bashiok @Aerisot Yes, they're different.

And in this answer I say all files that are on MAC. And there is a file that saves your preferences called D3Prefs.txt the location is: /Application Support/Blizzard/Diablo III

But as @Bashiok said in his Twitter, the beta is different from the retail version, besides, all your champions and preferences are gonna be reset. So you don't need save any files. And if you did, they are useless to the retail version.

(You asked the question of the answer that I linked above, so I'm assuming you could use this path better than a windows one. But you can find those files on windows too (some of them at least))