This is the end. I have some thoughts about this game, especially the way literary genres affected the depiction of events in-game. But you don't are about those.
TL;DW?
1) Shoot the red bits
2) Definitely worth playing
3) Short game, overall (7 hours?); wait for it to go on sale, but do get it.
4) No stealth options here, but that's fine. Good combat except that bullshit tank.
This was not my first attempt. I got frustrated with the tank, so I took a break, went to see Star Trek, and came back refreshed and one-shot it.
http://4a-games.com
http://enterthemetro.com