Second screenshot, this one full with UI

uh Rise of the Triad?

Nope, it's a lot older than the RotT remake (and a LOT newer than the OG RotT ofc).

then it's SiN Episodes: Emergence?

Hello kalirion!

From the first screenshot, I got the feeling it might be from the game "SiN Gold". Somehow, the landscape outside of the playing field reminded me of it.

But the second image made it immediately clear to me through the dopefish and the interface that it is "SiN Emergence"! Wasn't it even built on a version of the source engine (Half Life 2's game engine)?

Kind regards,
foxgog

(P.S.: Over the weekend, I am not going to be available. So, if the others do not want to wait for next week, someone might step in my shoes.)

It is indeed, your turn!
Yup, it's a Source engine game - something I myself hadn't known before playing it! Gotta love how good it still looks, to my eyes at least, while still running fantastically on my ancient "gaming" rig (though it's many times more powerful than anything available when this 2006 title launched ofc.)

alright , next one

I know this one, it was actually the first game I thought off when reading the screenshot name before even clicking on it. Will give others a couple days to research & guess. I really think someone willing to put a bit of time into research would be able to find the game from the given sub-grenre aglone.