Talk:Collection Mode/@comment-107.211.254.190-20160414015414/@comment-26662093-20160414091306

The stickers you get from cases are random, Lissa, and they may not necessarily all correspond to that particular case.

So no, you don't have to buy sticker packs to get the stickers from The Death of Rosa Wolf.

And yes, it is completing the case in both regular and Elite Mode before you can play it in Collection mode.