Well games you named are very different, some of them only on slightly border of "shooter" genre actually. Cryostasis is more like mex of fps and survival, fallout 3 is post-oblivion bethesda game but still not just fps like fourth one, same goes with new vegas. You named many great games that actually has not that much in common, this why I responded like that.>>20677
Instead of "remaster", it's always better when fans of devs releasing opensource engine for old games. It's mean it can constantly update by community and never get outdated and work perfectly on any platform you want like forever. Speaking of gothic, there is such project - re-goth, but I don't know if it's still going or author abadoned idea https://youtu.be/DX92f8CrjrE
You not liking GZDoom? But it's just opensource engine with hell of parametrs. You playing on it like vanilla doom wads and all? People use capibilities of GZDoom engine to make their own even not maps, but games more advanced than build engine ones sometimes. I think there is no really serious point to try gzdoom if you want "pure vanilla" with some options, it's more like work for "Chocolate doom". GZDoom you more use to play WolfenDoom blade of agony, Golden Souls 2, Winter's Fury, REKKR, Ashes 2063 etc. etc. There even top down games and maps that replicate portal cube gameplay. Speaking of wads and mods - just go to https://www.doomworld.com/cacowards/
which do top ten wads of the year in many, many yeras, choose what you like and play them. There also a youtube channels, that reviving doom mods https://youtu.be/sH9AffDQUaw
Doom ports currently just a platform for crazy experements and like some sort of "indie games". Original doom game is not like early 3d, it's from more ealy messy times of 2.5d and by engine, and because massivley using flats to represent objects.
nQuake - never tried it, I playing q1 and singleplayer q1 mods via QuakeSpasm engine.
Well from early 3d games what can I also recommend... I guess you played half-life and it's original expansions already, but you may try Gunman Chronicles - goldsrc engine kind of fan mod game that become official game thanks to sierra, basicly fps game with mix of system shock, space, dinosaurs like in turok, cowboys and south states confederation soldiers also in space. Very well crafted game for what it is and actually fun.
From non-fps there is game like Rune. This is more like close combat game and it's great for what it is. Like this there also Hexen 2 and Heretic 2 by raven which I like, but can't really 100% recommend them because Hexen 2 have very confusing puzzles. Heretic 2... well you may try it.
From strategy games it's of cource warcraft 3 with it's great low poly graphics and command and conquer generals - but all this well known classics and I may guess you already familiar with it.
Well I can also recommend you X-wing 1998 edition if you have joystic and you like half aracade halws serious space simulators... tie fighter is much better than x-wing as a game but 1998 edition of tie fighter is really crappy for couple of reasons and 1995 one may be too early for you. There X-wing alliance - I never liked it because how it presents plot and atmosphere and other reasons like just overlayed lazy guy and some ugly starship desighns.
Speaking of star wars - you may try Episode I Racer - cool little arcade star wars pod racing game. It got released on gog not long ago and I think gog edition is fine.