Denizens - Intestinal Fortitude

Find the Riftworm Heart

From the get-go, grab the Car Gold Magazine along the left wall, then follow the path.

Avoid the Digestive Teeth

You'll soon come across several large teeth that will crush you if you don't get out of the way in time. For the first two teeth, simply run across (one at a time) as soon as the tooth begins to rise. The third is a bit trickers, since it's so long. Venture up as far as you can to its left, then turn 45 degrees so you're facing you destination, then just run like the dickens when the tooth rises. This next section is a long string of teeth that chomp down just far enough to crush you if you stand. As such, you have to run the entire way—just look far ahead and avoid hitting the walls. Alright, you're almost done! You can walk past the first horizontal tooth-set, then run across the next two (one at a time) when they rise, then dart through the final one.

When you reach the downward slope, several intentional parasites will run your way, but they're no match for your machine gun. Onward, you'll trigger a cutscene.

Outrun the Wall of Debris

You've seen Indiana Jones, right—with the boulder? Same deal here—keep running to avoid being squashed (follow your teammates if you don't know where to go). But make sure you avoid touching the villus (the plant looking patches), as they're poisonous and can kill you. A short ways in, you can grab a Cog Tag along the left wall, just before a small alcove. When you reach the dead-end sphincter, shoot it relentlessly until it opens.

Just beyond the first sphincter are several parasites—shoot them quickly before continuing. Follow your squad to a flesh wall you need to chainsaw through. Run down the path to another sphincter door and shoot it open.

Run through the crap-creek and shoot the teetering vehicle until it drops, creating a bridge. Now run like hell along the path (ignoring the enemies) and chainsaw through one more thin membrane to complete this section.

Avoid Jets and Pools of Acid

As the objective states, you'll have to work through the stomach, while avoiding being sprayed or stepping into pools of acid. Unfortunately, there are jets all over the place just spraying the stuff. But you can temporarily disable them by shooting the green bulb on the end. So you start at a fork in the road; the right leads to ammo, but the left is the only one that can get you out of here. It's pretty basic from here: shoot the jets to stop them spraying and continue forward.

Pass Through the Intestines Quickly to Avoid Suffocation

There's no time to dilly-dally at the intestines, as the gasses that are present will suffocate you if you wait around long enough. Run through the main tunnel, skipping all of the side routes. Go through the large opening and turn left, then make another left and hug the right wall—follow the red-lit ground straight to a fleshy wall you can chainsaw through to escape.

Cut Two Arteries to Destroy the Riftworm Heart

After chain-sawing through the fleshy wall, you'll find the heart. Chainsaw through the artery on either side, then escape up the path that opens. Shoot the parasites as you go, and cut through another flesh wall to reach the second heart.

Cut Three Arteries to Destroy the Riftworm Heart

Another heart and three more arteries you need to chop—the path on the left leads to all three. When done, continue up the path along the wall and saw through another membrane to find the third heart.

Cut Four Arteries to Destroy the Riftworm Heart

As you explore the room, parasites will often emerge from the ground—just back up and shoot. Now you'll find the four arteries in groups of two (one behind the other) on either side of the heart. Cut all dour to complete the level.