whiteM1lk said:
is second person like over the shoulder?
I honestly don't know
No. First and Second person both place the reader in the shoes of the protagonist. In First Person, the character is a unique construct of the author but the narrative is explored strictly through their own perceptions. In second person, the protagonist represents the reader personally and is not a unique construct of the author but rather of the reader. Third person the protagonist is observed by a third party of varying levels of perception.
Doom is second person in that the protagonist literally represents the player in the world. Duke Nukem 3D is first person because the protagonist is a construct of the world. Half-Life skirts this line and is technically first person but the actual effect is closer to second person (thus why the character of Gordon Freeman is so well regarded in spite of having no real characterization to development to his credit. All of this is the result of the player changing and growing in response to the story that unfolds around them). Fable is distinctly third person but, since the character is a construct of the player, it becomes a largely second person narrative that shifts to third person from time to time during cutscenes.
It is worth noting that in terms of camera perspective (what most people are discussing in this thread) both first and second person are best represented by a first person camera perspective while third person is ideally represented by a third person perspective.
It is also worth noting that, in many, many games while the narrative is very technically first person (you are controlling a character that is a construct of of the developers), the game is largely second person because of a complete lack of characterization. In Call of Duty, only the barest details about the PC are given and the rest is simply the player's creation. As a general rule, FPS games are neither first person nor second person explicitly but rather a combination of the two but they very generally favor second person.