This game was a runner-up in the 2018 Cacowards, and in my opinion it should've placed higher than that. If you like Doom, S.T.A.L.K.E.R., and Fallout, you owe it to yourself to play this game. It's one of the best total conversions out there. The level design is great, with plenty of well-hidden secrets to reward exploration. And you're going to want to explore as much as you can to find junk that you can sell at the hub to get better gear. The weapons are impactful, appropriate for the setting, and just plain fun to use. And the soundtrack is just plain inspired. Inspired by John Carpenter to be exact. At a price of $0, there's no reason not to give it a try. And if you end up liking it, then there are sequels and side-story games that you can grab on ModDB.