I remember having a mission completion randomly when dying near the barrel that turns off the turbines https://steamcommunity.com/sharedfiles/filedetails/?id=1370908677 even tho that was in reactivedrop i think the alien wake up logic wasnt really changed and sewer still uses the same visradius there so shieldbug can come into pvs early

don't be discouraged, i have quite a lot of hours in this game and speedrun experience on singleplayer challenge, your runs were okay too :)