"In some ways, it's a rather grim exploration of the relationship between player and player-character. Are we really in control of Captain Walker, or do we merely represent the last vestige of self-awareness in his increasingly damaged mind as he railroads us into committing atrocities, and our distrust and fear of him grows in parallel to that of the men in his command as he weakly tries to rationalize to both them and us until we feel as disconnected from him as the rest of reality and... (*weary sigh*) Do you remember when shooters were about killing demons from hell? Those were good days..."