The Dark Harvest Prey Guide (2006)
Last update: 11 May 2016
The portal got you to the rebels' HQ. Jen will take care of the wounded (#253), and your role is to exterminate everything that approaches them. The enemies will start appearing after a few seconds - they'll enter the room through a hole in the wall (#254).
Kill the hunters and use the passage that was created moments ago. Go forwards, avoiding any contact with tentacles reaching from the floor. At the end of the corridor enemies will open a hatch (#255) and you'll be attacked by mutated dogs.
Go forward, exterminating more enemies along the way. After a short walk you'll reach a huge room. Jump down from the platform (#256) and kill a few enemies wandering here and there. In a few seconds you'll see a portal opening, which will throw two Centurions at you (#257).
You don't have to worry too much about this battle. First of all, you're still immortal. Secondly, these guys seem to be less resistant than the ones you've fought before. A few accurate hits from a grenade launcher for each of them and you're done. When you defeat them, you'll have to deal with a few hunters.
After the fight, you'll see Jen being kidnapped once again. Recover your strengths and ammo, and then go through the blue portal (#258).