first person is from the perspective of the person in the events taking place. it uses words like I or me. 2nd person is like directions. 3rd person is like a person telling a story about someone else.
First person, shown from the eyes of the character. Third person, shown over the shoulder of the game character so you can see him. If these are not the answers you were looking for, Google it. Not sure what second person is in a gaming perspective.
First Person is you telling the story (with clue words I, me, We), Second is like a cookbook. Giving you direction (like 2nd, get 2 eggs yady yady yady ya.............), and 3rd person is someone telling a story. (No I's, Me's, or Us) There's 3 levels of 3rd person as well.