I am missing gigs at:
Crystal Mine [unlocked]
Volcanic Rock [unlocked]
The Abyss [unlocked]
Wembrick Stadium [unlocked]
UFO (140/155 stars)
Space Rock Festival (74/240 stars, haven't played Endless Set. But even then, I'd still be missing a gig worth 15 stars)
So, what do I need to do to unlock these 6 (I'm assuming 3 song) gigs?
EDIT: Ha! I was replaying some gigs to improve some of my star ratings on them.
I ended up unlocking the live album at Wembrick and an album promo at the Volcano. Now, I'm only missing 4 gigs.