There's a part as a sniper, I think, and maybe it was third person mostly? The name was initials that remind me of XKCD, like that sound, but probably 3 letters. And I feel like the character wore white cloths. PC game. This is a stretch.
it was actually one that I remember playing when I was younger. The name always stuck in my brain because of the initials and what they stood for. Glad you found it