Fatal Twelve is a life or death drama visual novel that focuses on a death game and has a light yuri substory to go with it - specifics about the yuri-ness -

 I really enjoyed this visual novel and feel like it has some really strong highlights but also some faults that prevent it from being rated truly highly.

This will be very general as going into almost any details would be full of spoilers for a visual novel focused on a death game like this. The story does an effective job of introducing all the characters to you in rather swift fashion when they get their time. It manages to build up enough of who they are that I felt myself caring about them - some more than others - as the story went on. This is helped by some shifting character perspectives that show different angles to the story as it persists. A significant portion of the characters also show some significant character development through the story which is appreciated. I think the middle section of the story was also incredibly interesting and found myself binging through it in just one sitting without any trouble at all.

The negatives to this visual novel are a bit frustrating. While the middle of the story was quite good, - spoiler for type / number of endings only -

There were also a few technical issues but none were too major: the achievements are a bit buggy and I had to re-choose some options a few times to trigger the "choose all options" achievement, and one other achievement only popped upon replaying a route. There was also a weird issue with it on full screen that it would randomly flash a few times like it was resizing to my screen again, but this didn't cause issues, it was just distracting for the second it'd do it and it would occur every few hours without being able to find a cause or solution for it.

Music is relatively good, the BGM lends some extra feeling to some scenes, but at the same time I feel like it plays a bit too early in some scene transitions, i.e. playing the "bad stuff happening" music before it's actually shown anything bad happening yet, which just telegraphs what is about to happen. Systems are standard as this uses Ren'py.

Overall I'd recommend Fatal Twelve to anyone looking to read a life or death drama visual novel. It's pretty good and for the most part my complaints are pretty minor. While there is a secondary yuri story to it, this is largely not a yuri visual novel, so don't let that deter you.