Chinese death game where fourteen people from across the world are mysteriously drawn into a sealed "Ephemera Manor" to partake in an ancient ritual dubbed "the Feather-Burning Rite".

Lovecraftian death game for who should be the family's next successor

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This turns into a death game of sorts but at the core it's an eroge yaoi game. There are branching/different endings but a lot focus on the fate of the protag + LI instead of classic death game stuff

The setting is a death game but it doesn't impact the story since it's a eroge yaoi game so it's barely relevant

Kodaka and his game company involved in making this game Kodaka wrote the Prologue and Ministry of Security

Death Game similar to Platinum End