How do you play co op story mode on uncharted 2?

To play co-op story mode in Uncharted 2: Among Thieves, both players need to start from the main menu and select "Co-op" followed by "Co-op Adventure." You can then choose a chapter to play cooperatively, either locally or online. Ensure that both players are connected and can communicate effectively to solve puzzles and defeat enemies together. Enjoy the adventure as you progress through the game's narrative!