A few random captures of Half-Life 2 on the Series X:-
https://gamerdvr.com/gamer/mashed/screenshot/22797868
https://gamerdvr.com/gamer/mashed/screenshot/22798040
https://gamerdvr.com/gamer/mashed/screenshot/22798227
https://gamerdvr.com/gamer/mashed/screenshot/22798242
If you download the image it will be in 4k, it looks way better than i remember on PC all those years ago.
https://gamerdvr.com/gamer/mashed/screenshot/22797868
https://gamerdvr.com/gamer/mashed/screenshot/22798040
https://gamerdvr.com/gamer/mashed/screenshot/22798227
https://gamerdvr.com/gamer/mashed/screenshot/22798242
If you download the image it will be in 4k, it looks way better than i remember on PC all those years ago.