This might sound a bit random, but Cyberpunk 2077 has this sort of warmup sound that plays through the game startup sequence that always gets me relaxed or psyched up to play. Another example is the title song in Trails from Zero. Calms me every time.
Whether it’s a sound effect, music, or a loading screen, is there a game that does this for you immediately when you open it?
It wasn’t as classic, but the valve intro for The Lab was really unsettling for me. Giant room with hundreds of valves, felt very surreal. A simple space that would/could never exist, but here I am standing in it. But I might just have trypophobia lol