This bundle includes:
Never Alone Arctic Collection - from what I've heard it's really good
12 is Better Than 6 - I've wanted this since it came out
Grey Goo Definitive Edition - Another one I have wanted for a long time, although I haven't heard much about it.
From the Depths - A another very good game, although there is a large learning curve
Robot Roller-Derby Disco Dodgeball - Not much I can say but it's a damn good laugh to play
CastleStorm
Memoria
Papo & Yo
I haven't played or heard anything about these three.
I already own most of these but plan to pick it up for these three (I don't own them, and have wanted them for awhile now):
12 is Better Than 6
Grey Goo Definitive Edition
Never Alone Arctic Collection
Definitively worth the $5 + the rest SHOULD sell for more than you paid on key sites (from the depths alone is selling for $4 nzd on G2A, this is the cheapest it can be got. Just checked the others and most are just over .8 euros each.