It's a reskin of "Alone in the Dark" (1992), but without the official names.
The rooms in the images seems the same, and the intro is exactly a copy/paste of the AITD (there's also the reflected image in the frog eye ...), just with changed textures/models.
The gameplay seems exactly the same from 1992 ... with all its lacks ...
BUT "The Mansion of the Macabre" is managed as a NEW game (in english / french), with a ~18 € price tag, while the "Alone in the Dark TRILOGY" costs like 6 €, and you get 3 games (translated in 5 languages) ...
Just have a look at the images / trailer from GOG and a playsession of the original game.
Michael Praise and Diana Eden investigate the paranormal in this return to classic surviv
www.gog.com
EDIT:
Some more funny stuff about the game is that it contain a HUGE list of copyrighted material, because they don't want anyone to STEAL or USE a "SIMILAR" title for a game or steal all their ORIGINAL assets of the game.
It will be released also on STEAM, BUT WITH A DRM PROTECTION !!!!!! Because you know, everyone wants to get an innovative game like this, with its super futuristic and responsive engine, and also so many polygons...
I'm super curious to see what will happen... if no one will sue them I will be disappointed... I have seen too many FREE fan projects made better than the original games and put to oblivion "just because copyright", now they did plagiarism that seems even worse than the original and they are SELLING it...
EDIT 2:
Originally the game was released only on "itch.io" with the title
Alone in the Dark "Remaster"
but then turned out that you just can't use a copyrighted title if you don't have the rights, so they changed the name !! And that's it !!