Epimutation

Spencer, a former investigative journalist, lives in a small bunker with six other people who have also managed to stay alive after a viral outbreak brought the world to ruin. They're attempting to adjust to this new normal, until they stumble across some notebook pages written by a scientist documenting the infection. Make life or death decisions, form bonds with your fellow survivors, and attempt to unravel the mystery behind the outbreak.

[From itch.io]