2 has the best story and upgrading/leveling up mechanics, 3 has better battles/customization but terrible plot (there's no cutscenes for missions) in my opinion.
2 has best story i like 1 the best cause there are you cant have one weapon and then find a better one of the exact same type. 3 was okay i liked it i guess but the maps were reskins music was really bad art style was... different. Most likely it was 2 or 3 that had best gunfights. Overall its probably 2 cause it had more customization, best story, gun not ripped from Call Of Duty and my favorite graphically.
