Part 28

Grab the Crystal Skull tied to the ropes on the watchtower on the far right side of the river.

Locate the JADE MASK behind the watchtower near the gate that opened in the cutscene (a non-interactive cinematic the game plays automatically).

Open the door, kick open the chest to find the JADE MASK.

As you leave, kill the water sentries that appear using the Scythe.

Use the JADE MASK on the emblem on the wall to open the secret pathway in the water.

Dive down and swim to the next area (PERUVIAN RIVERBANK - NORTH).

Emerge from the water and move forward to a dirty river.

Jump and swing on the branches above the water to reach the next area.

Upon landing on the dry surface, defeat the soldiers that appear.

Continue forward to a dead end with a zipline above the trees.

Jump to the zipline and traverse slowly to the other side.

Quickly move back to the dry surface and use arrows or Incendiary Shurikens to clear out the rocket soldiers that emerge on the other side.

Take the zipline to the other side.

Jump and swing towards the set of branches near the other side of the zipline.

Jump to a small dry surface with a hidden Muramasa's Statue and Crystal Skull #23 sitting in the vines. Grab it and stock up.

Jump down to the water and return to the zipline from the beginning.

Take the zipline to the other side and jump down.

As you move up the short path, defeat the soldiers that appear.

Activate the Save Statue but do not save yet.

Find a hidden area near the Save Statue (not the doorway area) containing a chest with an item. Grab it.

Defeat the two additional soldiers that emerge.

Now, save your game.

Enter the next area to encounter Large Dung Beetles.

Eliminate all the beetles using strong combos and Ultimate Techniques (UTs).

Approach the large boulder where the bugs came from and charge a UT to destroy it.

Jump down into the area below (LIMESTONE CAVERN).

Navigate through the cavern, slicing open small caves on the left and right for Essence.

Trigger the boss battle with the Bullet Worm.

Stand in the middle of the cavern and charge a level 2 Ultimate Technique, preferably with the Eclipse Scythe UT.

When you hear the boss approaching (like a speeding train), unleash the UT before it gets close to stun it.

Immediately evade into a nearby cave hole to avoid its tongue or spackle.

Repeat the process of using UTs, stunning, and evading. Do NOT use combos.

After defeating the Bullet Worm, jump down the chasm to find a Save Statue.

Enter the next area (POND SCUM) and avoid battling the worms that pop up from the water.