: I had a go at this too, although there were a few aspects of the rules I
: wasn't sure about. I was killing all Elites, but maybe we were allowed
: to bypass them if desired? In places, bypassing would've been easier
: (though boring). That's how I came unstuck actually. On my ascent in the
: main facility, I'd got back to the Hunter chamber and I was in good shape
: so I went gung-ho into the short passage containing an Elite with Grunts,
: and just before I could manage to finish off the Elite (a red), I got
: killed.

: But that brings me to another rule aspect I wasn't sure about. What if I tag
: or needle an Elite, and the bang happens to kill non-Elites too? I was
: assuming that was forbidden, because I'd be responsible for their deaths
: even though I didn't target them directly. So instead, Elites had to
: sometimes be carefully picked out using non-explosive weaponry. That's
: what I was trying to do when I got killed. It was troublesome with that
: Elite because he had a mob of Grunts around him.

I was somewhat unclear about the rules as well, and almost asked before i started playing. But i interpreted it as any kill that wasn't required to complete the mission (i.e., the elites on the exit tier prior to the dropship coming for evac) was not allowed - at least if you wanted full points.

I would end up having to carefully shoot some grunts in the chest so they would stop firing on me and making easy work for the elites, but occasionally i would kill a grunt - at this point i would revert to the last checkpoint. Wasn't sure if this was legit or not but i didn't want to make any progress in the level if a kill was made.

: Used up both the medkits below?

No, i will give picking up a kit a try although everything is alive down in this area, didn't think it would be possible. The only way i was able to make it past that room was dawning the invisibility cloak below and making it into the room prior to it dissipating and shocking some of the guards when i appear.

I fear that i may need to cave and kill some of the covies leading up to the gold elite, not sure how i could evade him with everyone else still alive. I would say employing these rules force me to count on luck quite often (but that's the essence of John tho right?), I do drop back and try to figure out the best course of action at the difficult spots - but even still i need the right reactions from the elites to get by.

Hope to report back with my final attempt later today/tomorrow.

: Yeah, it freezes when you get far enough away. You can potentially return
: with a rocket launcher, to rejoin the attack and finish it off in novel
: style.

Ahh, freezes eh? Pretty cool, could def have a good time coming back with rocks.