What game for you was and still is the most epic ?

Hello , I would like to share with you my impressions of some games. They got me very much hooked by its atmosphere .
This game:
Advent Rising
Half Life
both games are good in their and have its own unique atmosphere.
but unfortunately neither the first nor the second ( by the news ) continuation of light will never see (RiP great projects )

And what games have affected you ?

thank you for your attention