Rush is linear, however inside the Metro you have different paths and such. I usually take a path and backtrack down another path, and the silenced weapons have a great time just killing people before they know what is happening. One thing i want to hear you comment about is the knife. Seems to be slow to knife when others are around, which is the big problem for me. I seldom use it. Also I forgot to mention how important the fire mode selection is. I switch as I move into different areas, IE switch to single to engage far targets, auto for close combat, pretty much common sense, but if you get in the habit you don't realize you are doing it and you play REALLY well.