Happy holidays peeps!
I finished Abyss of the Sacrifice and did manage to somehow clock in 33 hours so I guess that's a relief. Though admittedly I probably lost 10 hours just getting absolutely hardstuck in some puzzles, so it's maybe more of a 20-25 hour VN depending on how gitgud you are.
There's only 16 BGMs, but they've got some pretty catchy techno-y escape room themes going on so I never felt the tracks were too limited/stale:
I enjoyed my time with it. Again, most puzzles are doable but there are some that are wtfmuxlogix-tier so I recommend if you are approaching 30minutes+ on any particular puzzle to just go look it up (I used this site which was for the 2010 game, and just google translate the page) to save yourself some frustration.
The pacing can feel a bit off sometimes because every time you pick a stage you'll also get some background lore characterization flashbacks on that specific heroine, but in a story that mainly focuses on the isolated trapped mystery aspect you kind of don't need to know their backgrounds (ie. Zero escape did fine not knowing many of the character's backgrounds prior to them being trapped) and it can interrupt the flow sometimes when you just wanna get on with the story. But hey, it's 5 kawaii high school grills, so we gotta get some characterization goin' on.
The overarching mystery is decent, but nothing too fancy if you've already played the likes of Ever17, ZeroEscape. Missed opportunity in that you'll probably have a good idea of what's going on maybe 50-75% of the way through and then it's just figuring out how to escape, no more mystery, no more twists and turns.
The process to get the ends is in itself a puzzle, which I kind of thematically liked: there is an ending for every heroine, with one of them leading to the true ending, but it's based on what order you play the later stages in the VN. An enforced play order so to speak. So you'll have to pay a little bit of attention to what unfortunate shenanigans happens in the later stages so you can eventually pick the right play combination to victory. Of course, you can just walkthrough the play orders for the endings, but I think there is some narrative value in trying to figure it out yourself.
Playing certain later stages will lock you out from playing other stages because reasons*. (Blue is a completed stage, Gray is a locked out stage, Yellow is a stage not yet played, and Blank is a stage you've played on a prior run but not unlocked on your current run because reasons. You can only play Stages on your current column). Jitka's "Zero" stage is the default game over btw, so I was screwed on the pic above, but thankfully the game lets you menu one way back to a prior stage completion point once you get an ending and try proceeding again from there.
*reasons spoiler:
...Think you can make it to the True Ending? Or will you be doomed to eternal failure Raging Loop style? I for the record tried for about 30 minutes of play orders for the True End but threw in the towel cuz it just ain't fun having to skip through the stages lol
Overall if you just wanna play another trapped sci-fi mystery escape room VN, Abyss is a solid choice