Underrail is an old school turn-based isometric indie role playing game that focuses on exploration and combat. It's inspired by western RPG classics such as Fallout, Arcanum, Neverwinter Nights and System Shock 2.
The game is set in a distant future, when the life on the Earth’s surface has long since been made impossible and the remnants of humanity now dwell in the Underrail, a vast system of metro station-states that, it seems, are the last bastions of a fading race.
The player takes control of one of the denizens of such a station-state whose life is about to become all that much more interesting and dangerous, as our protagonist is caught amidst the conflicting factions of the Underrail as they secretly but violently struggle for the Humanity’s last gem of hope.
Source: The Developer Website.