I didn't realize how important headbob was until I played an RPG without it
I watched two short walking clips back to back—one from The Outer Worlds 2 and the other from Kingdom Come: Deliverance 2—and the difference, while small, felt huge. In The Outer Worlds 2 I didn't feel like a person moving through the world; I felt like a perfectly stable camera, unnaturally divorced from the motion of the body.
That sensation comes down to headbob: the subtle camera movement that mimics a head's natural bounce while walking or running. Headbob is so common in first-person games that it usually goes unnoticed unless it's excessive, but The Outer Worlds 2 mostly removes it.
Except when sprinting, your head stays still, which breaks immersion and makes the experience feel off. There are plausible reasons for that choice. Headbob can trigger motion sickness, so many games offer an option to disable it, and competitive shooters sometimes omit it to keep aiming consistent.