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The Orange Box: Portal Hints
The Regular Way
1 of 3: Go over to a spot where you can easily see the top of the lower slanty door, then fire an orange portal onto it.
2 of 3: Look down and fire a blue portal at the floor, then jump into it, ready to fire another blue portal at the floor when you fall toward it again.
3 of 3: After you fall through the second blue floor portal, you'll be flung up high enough to fire an orange portal onto the upper slanty door. (Though it's hard to hit it before you fall back out of range.)
