Minecraft hardcore survival
the evil within 2 classic mode
stop saying minecraft please
i tell you the most hardcore game in the history of games
For Honor is so shit that everytime you die you have to use new gear because you break the old one after dying to bugs and stupid crap
Fortnite is quite hard core.
Minecraft hardcore survival mode
Or escape from takrov
Minecraft hardcore survival >>
Isn't "SCUM" one of those games? Friend of mine plays that shit for hours on end, can't be bothered with it myself 'cus CS.
No fps games, but XCOM (on Ironman) Faster Than Light, RimWord, Stellaris... some good games with hardcore modes.
Not a single Path of Exile comment, i'm disappointed.
Fallout New Vegas Dust mod
search for a genre called roguelike
Basically you're looking for roguelike games. As mentioned before, binding of isaac afterbirth+, dead cells, enter the gungeon are all great games. Also check out nuclear throne, hotline miami, spelunky, even crypt of the necrodancer. Maybe even End is nigh (good luck if you want all achievements).
To give you some different games from each other
Binding of Isaac
Getting over it
Hitman (2016) in professional difficulty