I recently moved my FTB Infinity world onto another machine to run it with a server. Doing so reset my achievements. In trying to get them back I've ran across this syntax for vanilla achievements:
/achievement give achievement.<achievementID>
It works fairly well for vanilla achievements, since the wiki has a list of achievement IDs, but I seem to not have such luck with the various mod wikis, as they don't seem to list the various achievement IDs.
How can I give myself the various mod-added achievements?