I don't know.. maybe. I really hate the flying drones. I also keep running out of bullets. looks like you have to keep the aliens gun or you always run out of bullets.
oh, I had to look at that walk through cause I was stuck in an arena after killing the spider mechs.
# Go through the open doorway and drop down into a garage. There's a Spider Mech waiting for you outside, but stay in the garage for a minute. Patrol drones will stream in from the doorway you just walked through. Kill them all before attempting to move outside.
# When you see an opening, run outside and down the first staircase in the middle. Pick up the LAARK off the soldier's body. Feel free to take the Marksman here as well.
# Go back outside and take out the Spider with the LAARK. Hybrids with Bullseye Mark II's will attack you from above, use the Marksman to snipe them.
# The garage door will open, revealing two more Chimera. Blow up the explosives inside to kill them quickly.
that garage door never opened up. I think it's cause I killed the spider mechs from behind the door before you drop into that arena.