Map Legend
1.Test Chamber 12 Start Point
Test Chamber 12 End Point
Ahead of you are a series of stairs. Don’t descend them; they’re just there in case you screw up, which you won’t. Instead, fire an orange portal on the protruding panel right above the stairs. Now walk toward the edge of the room, drop a blue portal on the surface of the pit before you, and jump through it. Whee! You’re going to have to do this again momentarily. Thankfully, Flinging never gets old.
Turn 180 degrees from where you land, and you see the orange portal you just placed. Aim for the other protruding panel just above that one, and replace your orange portal there. Jump into the pit again, and fly to the next platform.
Another quick 180 reveals yet another protruding panel right above a red button on the ground. This one is slanted upward. Get ready for some fun and aim your orange portal on it. Drop down a level toward the second ledge you reached, and dive into the blue portal that’s still down in that pit. Double whee! You’ve just performed a “Wedge Fling,” so named because of the inclined nature of the exit point. This maneuver send you farther, faster than regular Flings.
The Wedge Fling has propelled you to the last surface you need to reach, which houses a Weighted Storage Cube. Grab it, drop down to the level below you, and depress the button. Wedge-fling back up to where you found the cube and exit Test Chamber 12.