Escape From Tarkov is a hardcore story-driven MMO that combines FPS/TPS with RPG elements. It's being developed by Battlestate Games in Russia which contains some team members who helped create Mass Effect/Metro & S.T.A.L.K.E.R & is being built on the Unity 5 engine. It's currently in extended Alpha & should soon be heading to Beta.
It's based in an alternate universe around our present time, in the fictional Russian city of Tarkov, the northern industrial and financial center of the country, and its suburbs. The game events, in turn, set background for the Russia 2028 universe. Full link here.
Players have 1 life (if you die other players can take your stuff) to clear the session with all your acquired items & loot & find the exit.
FAQ's are on the Reddit