System Shock 3 (small) Teaser

Yeah and even the devs are different, but still...

I did. Soon it's going to be a trilogy.

It's not really an FPS in my book. Far more of a survival horror. Shooting is a fairly minor component and doesn't have to feel silky smooth, it certainly didn't in the previous games.

Subnautica was a first-person game made with Unity that looked and controlled just fine.

Major concern is the use of Unity engine: it's unfit for FPSs

Verdun, Immortal Redneck, The Signal from Tolva among others prove that FPses in Untiy is perfectly feasible.
If System Shock 3 proves to be a dud, it's probably for other reasons than the game engine used.

I'm glad you said it yourself, the interface is very clunky (much clunkier than games released in the same year). Several games from the same year hold up much better technically. Ammo is much too sparse, especially if you backtrack, enemies re-spawning and nearly never dropping ammo makes this problem worse. Early game is difficult because of this ammo sparsity. The story is as bland as can be, not compelling whatsoever, with a single predictable plot twist. I don't really mind old graphics I've played many old games and grew up on them. I didn't find much atmosphere in either game that was very compelling, but this is mostly a subjective feeling so it's different for everyone. Didn't pay particular attention to audio, can't remember anything remotely memorable about it though. Again this is just my humble opinion, though I do feel I've played the game much more recently then most that have fond memories of it.

• Simcity 3000
• Final Fantasy VIII
• Planescape: Torment (only played it a few years ago and it holds up much better)
• Quake III Arena
• Resident Evil 3: Nemesis (played many years after release still very enjoyable)
• Legacy of Kain: Soul Reaver (controls and mostly the camera is kind of clunky, still not nearly as unfun as SS2)
• Aliens versus Predator (don't know how it aged however)
• Dungeon Keeper 2

I only included the games I've played, but all of these far surpass System Shock 2.

Epic don't care which engine you make your games with when it comes to throwing millions your way to get an exclusive.
Metro Exodus and The Division 2 use proprietary engines. Slime Rancher runs on Unity. Hades by the looks of it uses Supergiant's own engine etc.

(Although devs that do use Unreal get another incentive to take the money; they also won't have to pay license fees on the engine for copies sold through the Epic store)