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Activating the moving platform13 hints left
Your old pal Energy Pellet is back!

Where?

Good question. There's a nice big window overlooking this chamber; you could try to spot it there.

Ah!

It's in another room, and that's not all - there's an orange portal opening on different walls every few seconds.

How does that help me?

Put a blue portal down; you'll get a better look at where the orange portal has appeared that way.

What am I waiting for?

A spot that looks safe to exit - most of the floor is acid, after all!

Exit when you see a standing button.
When you activate the button (by facing it and pressing 'E'), the door above you will open for a few seconds.

How does that help me?

That door leads to the energy pellet room!

Some quick shooting might help you get up there.
Shoot a portal inside the room while the door is open, then step through the orange portal when it's within reach.

You'll then be inside the energy pellet room.

What now?

There's another window to peek through here, and it'll tell you where the orange portal is currently active.

How does that help me?

You need to get the energy pellet out of this room, but your timing is important.

Help me out.

Shoot a portal at the scorch mark on the wall when the orange portal is facing the activation hole.

The pellet will fly through and get the platform moving, ready for you to step through it yourself.
It's easy to miss, but another standing button appeared when you grabbed the upgraded portal gun.

Note that you can now left-click to create a blue portal, and right-click to create an orange one.

Where is the button? What does it do?

Next to the platform where you grabbed the upgrade - it opens a door above your head.

Help me out.

When the door is open, shoot a portal inside. You should then shoot a different coloured portal on a surface you can reach, and step through it to reach the elevator.

Guide help

This is the low-spoiler guide for "Activating the moving platform" puzzle in Portal. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.

Up to "Test Chamber 11"
Hints written by Kieron West
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