Thank you for playing! I think you actually play the role of the sniper, as this is the only character presented from a first-person perspective. The narrative, however, is delivered in the third person, placing you more as an observer of the unfolding story.
As for the encryption and installation query, the file utilizes SFX compression, which means it doesn’t actually install on your system. Each time you open it, the file simply decompresses, so there's no permanent installation required.