A new mod lets you play Diablo 2: Resurrected in first-person and third-person.
D2R-3D adds free camera control. F12 turns it on, the mouse wheel zooms, and holding the middle mouse button lets you drag the view.
You can run the whole game in third-person, or zoom all the way in for first-person. It does not change the core game.
The standalone build is still experimental. It can trip the game’s integrity check and crash after about a minute.