Edited after playing the complete version.
Let me start with telling you, the endings suck, all three of them.
The story becomes an incoherent mess, all the big build up ends with basically the big threat being nothing but a lie from Maxine.
The sweetest of the girls becomes a deranged psycho, Maxine already is a psycho, considering she actually lied to their friends, solely because she wanted to preserve her family name.
IDK, to me, it feels as if they ran out of energy and just wanted to end the story, because a lot of it makes no sense considering part one and even most of part two.
This game was trying to do something different, but due to the miserable endings it failed, and so I have to correct my rating downwards.
I am so close to giving the game 2 stars, but I like the visual look of the games and the sex scenes are well-made and extensive and until it all falls apart, I was entertained and even intrigued to an extent, so I'll stick with a three-star-rating.
My original review can stay as it is, for the first part, but this ends my thoughts on the game as a whole.
I swear, I will never understand the way reviews here come together.
You get games with barely comprehensible English and with horrible, monstrous character models, which barely have any story, that have five - star after five-star review.
Why? How?
And then you have a game like this one, and it has barely 3 stars.
This game has a story, this game has great renders of beautiful girls, which actually look different.
Yes, the choices so far don't change much, but there are choices and at least one that offers you significant information.
Also, this is like the first version of the game, and yet it offers hours of content.
Where is the rationale to rate this with one or two stars?
I just don't understand it.
Anyway, this game is something different again from Inceton.
His last game offered us what started out as a Ground hog's day like Ren'py gameplay, which then turned into an apocalyptic SF story.
This one starts out like a B-grade slasher film, but then turns into a whodunnit.
Basically, the MC by accident gets stuck in a lonely, isolated cabin, with the four girls (his sister and three of their friends) he just drove there.
After a night of drunk debauchery with his sister, of all people, the MC slowly realizes that this is more than just a reunion of high school friends.
Not only are there conflicts, secrets and hidden relationships, no, the MCs best friend disappeared five years ago, when he was with his girlfriend at the same cabin, something that the other three girls know, but no one else.
Because they hid any evidence and claimed their friend was with them the whole time, and never left with her boyfriend.
From there, we follow the MC on the path to find out what happened five years ago, what is happening now, and how he can survive it, while at the same time dealing with constantly lusting after his sister (and she after him) and also re-kindling a love-hate relationship with one of their other friends, who also has a huge secret of her own.
Honestly, as the story went on (and it is a huge amount of game already), I went from being completely uninterested in the crime plot and only trying to get the sex scenes, to really being interested in solving this puzzle.
It's not a flawless story, not a flawless game, there are many scenes that only set-up atmosphere but aren't really necessary, there are also definitely scenes where all curiosity and suspense are lost, and they just seem like filler, but the game always found a way to get me into it again and at the end of part 1 I was seriously annoyed, because I wanted to know how this continued and of course how it will end.
This is a game that mostly tells a story, through this the actual changes from your decisions are mostly cosmetical (at least as far as we know now), but otoh, that story is also what made the game interesting for me.
I think that Inceton games get rated unfairly, some of the criticism is valid, but both here and with his other games I've read horrible reviews, where I honestly thought the reviewer and I were playing a different game.
Part of it is due to people not understanding that player's choice and agenda are not always the main point of a game, Inceton actually tries to do more than just pure porn games at times, with one of his previous games he not only tried an innovative story, but also an innovative gameplay for a Ren'py game, with Shackbang he tries to tell a story and so far the player choice is secondary to that.
And people need to get it in their head that this doesn't make either of the two a bad game. It might not be a game that plays to your taste, but that's just subjective, not an objective reason to rate a game low.
TL,DR: This is at first a murder mystery, a story that inceton and his team are telling, it's a porn game only secondly and your choices also aren't the most important factor (so far).
The renders are great, the girls are beautiful, and again, they are different types, even if not really original characters. The sex is there, and it is done well, but it is not the main focus. In my play-through the MC had sex with his sister several times, also with his frenemy, I chose to watch lesbian sex twice and worked towards being part of a three-way (hopefully) in the future. There is also quite a bit of nudity unrelated to the sex.