Played a couple more hours of this today, been playing for about 2 and a half to 3 hours so far and just met a crazy wizard type alien dude in the sewers. On the approach to him I was constantly down to my last mag so had to get a little bit creative in places. Such an awesome experience so far and runs flawlessly maxed out on my hardware which is nice. I seem to find myself exploring everything and think I might have even been running out of time on the previous section. Might have to pick up the pace a little. Are there time limits?