Ghost in the Shell: Stand Alone Complex (PSP)

A common misconception of people is that this is a port of the PlayStation 2 game, whereas in actuality it is a sequel. Dealing with similar concepts to other incarnations of Ghost in the Shell, it has an original storyline which follows on from and refers to the PlayStation 2 plotline, and features first-person shooter gameplay. Source: Wikipedia, "Ghost in the Shell: Stand Alone Complex (video game)", available under the CC-BY-SA License.