Hello Evan The Helper NPC and everyone else; I have a profile with all CG's except for the following buttons for version 03.08.0 0.3.09.0 0.3.10.0:
As of fifth of July 2021, this is now updated.
As of 30th of August, this is now updated.
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Hiro: Second to last row third column (Next to Face sitting, above Cowgirl (Male)) - Still missing, no clue what this is.
Innkeep: First row second and third column - Second row all columns - Third row first column - Still missing, seems to be a male version of the innkeep, but I don't know how you'd get these. Edited into the file - They're the same repeating buttons in masculine/feminine versions, but all images feature a male innkeeper. Oddly there's an extra image (and game over version) in the game itself, but not listed in the gallery.
Persephone/Helena: First row second column - Still missing. Finally solved, just copied gangbang scene and removed 'bloody' - It's a non bloody version of the same.
Minotauress: Third row, second column - It's some 'Oral' variant, but just clicking through options doesn't unlock it.
UNKNOWN: It's the Demon King (queen) in the last zone. Nothing unlockable yet, as far as I can tell, you just sorta have to go there. There aren't any scenes either, just the paperdoll of the character itself.
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August Version Scenes (0.3.10.0 - Above scenes missing are still relevant):
Quetzal Goddess: Second Row, first and second Column missing. - No idea how to get, might be story related, completing with low purity does nothing.
Demon King is still just UNKNOWN, none of the options unlock anything.
Scenes added -
Dark Knight scenes (just variations of earlier ones, unlocked on first combat meeting)
Orc scenes (Face scenes, unlocked as 'slave' while choosing the 'Tease' option in camp).
Lupa scene ('Knot' achieved in brothel when she's added, possibly only through quest progression w/low purity)
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Profile link:
https://docs.google.com/document/d/15we8sC6WFMGb6em5BB2sxyCIJMxoO59zO_fHYnO_xj8/edit?usp=sharing
NOTE that this profile does not have a number of the achievements or events, but all the CG's apart from the ones mentioned above, which I assume most are looking for anyway.
I got them by combining my own playthrough with the CG's of yours, plus some guesswork of the Hiro 2 page CG's.
If you want the cheeves and so on, I assume combining them should be fairly easy as you just copy over everything below 'cgSeen' from my link.