ok, now that I got ending D, I see this:
and now gallery is unlocked
Yes, that's actually a bug: it shows that you unlocked ending B, but if you select it, it tells you that you haven't unlocked that ending yet. I actually fixed it and uploaded a new version with that fix. You can still get ending B with no problem though, it's just a visual bug that doesn't affect the game. Also, keep in mind that the endings will only show if you get that ending and then save that file (that's why you probably couldn't see the car ending: I'm guessing you didn't save after getting the ending so it didn't count as getting that ending)
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You mean after using the chemicals?
You can read the diary in the security office as soon as you get into the lab for the first time, it's near the lockers. The sewers are located south of the place where Helga took you, they are near some cells. The ghost is in the sewers. And the morgue is on the way to the paintings room and the statue gallery (the key to the morgue can be found in the sewers)
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