Oh, it was amazing!
I didn't know that there were two A-endings, incomplete and complete.
I've finally played through complete-A, with later selecting each episode and reaching the credits and "Accept this Ending".
I've already loved the game but suddenly got a great (both meanings) extra to it!
Thank you again.
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Just to clarify that I'm not missing anything.
There are 2-3 basic endings without credits:
Ending B, Ending A - incomplete, Ending A-complete.
Fork for A/B happens in Episode 10, not sure what triggers change from A - incomplete to A -complete (maybe Hard difficulty?)
After A - complete it is possible to replay earlier episodes, and after some of them it is possible to replay the prologue, triggering the real Ending with credits (I liked this one too).
On the other hand, after collecting 4 items (one in B - route, 3 in few runs of different A routes) it is possible to trigger Final Ending (or True Ending, I've forgot the name).
In the attached guide it is mentioned that it is also required to replay Episodes 10 and 5 - why is it so?
(I can guess that episode 5 is mandatory through the game, as you reach one of the "non-standard game overs" and episode 10 to get both A and B routes, but I'm not completely certain).
As a side note - "Alice non-standard game over" is still missing; I suppose it will stay that way, right?
---- SPOILERS ABOVE ----
By the way, Is there a chance for some novelization of any of your games?
I really like both the whole plot and every second dialogue line, it would be amazing to have easier access to them.