So! you probably don't need me to tell you how good this is... but I'm gonna do it anyways.
The good: * I'm so happy that you didn't abuse the fact that I turn the volume of really high so I could hear the voices, aka no loud jump scare. * The mood is fantastic, I just wish I played this in the evening so I would be extra creeped. * Voice acting was really good overall, I espechially liked how you were able to make all the characters sound unique, that really helped me understand who was taking. * lighting effects where superb!
The stuff that could be gooder: * It would be nice if the tapes where named/numbers so I knew if I found them all in order. * The timing between tapes could be better, so the ended before you found a new one. * I'd love some more atmospheric sounds, like water dripping, wind blowing etc. I must admit that I perused the game files and saw that you have some samples for stuff like that, but it's not implemented? since I couldn't hear anything. * I'd love to see some more stuff in the cave, like abandoned minecarts, pick axes etc. preferably stuff that helps the world building, like guy's gloves next to his lunch box.
Now, I got to the end and got my neck snapped, it that the actual end, or did I lose? Anyways, this was a fantastic atmospheric game, and with just a little bit more work, this is the stuff I'd pay money for. really solid job!