Achievement Thread - Guide on how to achieve them

What @Me1620 wrote makes perfect sense. Most of simmers I know or heard about systematically delete all those files, and though a lot of seemingly achievement related files are in the download folder, having some others in the game's temporary-like folder explains why so few such files can actually be found in the download folder (we're talking about 130ish achievement, so, given how Maxis had them set up in a completely update-unfriendly way, there have to be 130ish files).