Completed Arcane Adamantine, and Ak-Alakha.
Had to search for Nyarlathotep's Sand Castle. Yep, that was everything. Fought Shub-Niggurath for good measure.

1h 50m Completed Obsessive Brick Disorder and Firetop Mountain. Had to look up part of the OBD sequence, was able to fine the Firetop rune by myself though. OBD's final encounter completely bugged out on me the first time. Firetop might have also broken at the golden door. I was locked out of progressing due to the full scripted sequence not playing out in OBD.
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Arcane Monstrosity, good map.
Realm of Enceladus, alright map. Terror Fuma, very cool map. Forgotten Sepulcher was really cool. Leptis Magna, I couldn't figure out where to use the Serpent key and never found the blood key. Horde of Zendar was cool. Per Aspera ad Inferni was frustrating. Ogre Fortress was disorienting. Slipgate Conundrum starts episode 1...
Huh, the rune I collected actually counted for completion. Thus allowing me to skip replaying Crucial Error. Ah it's just a bonus credit's level at "The End" anyway.

Completed E1m1, The Mire, and Tears of the False God 2 19 - - -
Completed Crucial Error and Foggy Bogbottom. I spent far too long in Foggy Bogbottom searching for the Tomes of Power. Had to look up the last location. I'm not digging how there's this obtuse scavenger hunt I have to perform in order to unlock the final mission. I'm going to have to replay Crucial Error -_- 4 42
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Completed Necromancer's Keep, Grendel's Blade, The Underneath, and Place of Many Deaths.