do you have steam? The only one you can buy is the Definitive Edition, but you have everything there. I would recommend having a controller on standby for melee combat (and driving bc for me = easier), and keyboard and mouse for gun combat (there will be certain missions where you'll be seated as a passenger and need to "use the turret") I would advice you to first play to 2 main DLCs: "Year of the Snake" and "Nightmare in North Point" (both are standalone from the main story, but YotS takes place after the main, while NiNP takes place during the main, but doesn't seem to connect). I'll tell you some tips about the gameplay in the DM, if that's ok
do you have steam? The only one you can buy is the Definitive Edition, but you have everything there