THE INFINITE: Atmospheric Sludge Metal
To complete this challenge, you need to review each and every release on the list below. Note that ratings are not considered reviews. Also note that reviews do not have to be essays, but they must include personal views based on personal experience. If anyone's considering cheating, please realise that you'll only be ruining the Metal Academy experience for yourself.
Completion of any Clan Challenge will "lock in" that clan for that Metal Academy attendee. Note that completing any Clan Challenge will achieve this, so you don't have to complete them all for any particular clan. Once you've locked in all three of your starting clans, you can lock in a fourth one to add that clan to your profile. That's right, you can earn yourself a fourth clan!
NOTE: Atmospheric Sludge Metal is connected to both The Fallen and The Infinite, but when it came time to decide which clan this challenge would lock in, I made the decision to connect it to The Infinite only. The alternative would allow people to fast track a fourth clan, which would devalue the efforts of others.