well as expected the main list is just broad goals to meet, and it is entirely possible to finish with just the starter pack. no spoilers as nothing is specific to anything.
and i can also attest to the legitimacy of this site. so many people accuse this site of posting fake lists when their favorite game comes out with achievements that they don't like but x360a is always right!
seems fun and quite lengthy. depending on how many and how hard some challenges and things are this could take a while (which is always a nice big plus
)
the fun will come with all the extra play set specific trophies they add down the road (if they do)