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Half-Life Walkthrough Xen

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Use your boosted jump to get across the floating rocks. Crouch + jump.

Keep jumping down the platforms.

Jump on the big island and wait for a platform below you.

Jump on the lower floor of the island.

The purple lamps can zap you so try to avoid them.

Stay inside a green pool like this to replenish your health.

Find a crack in the wall to go deeper in the island.

You need to press three pedestals in this chamber.

Use the claw looking pedestals around the chamber.

Shoot the cage looking brown thing to release three butterflies.

The butterflies will land on the pedestals and activate a teleport. Enter it.