Review advanced portal locomotion techniques such as the Fling, Floor-to-Floor, Portal Ledge, Double Fling, and Wedge Fling in the Advanced Placement Portal Science section in Not Quite Rocket Science: A Portal Overview
Portals
Goal: Bronze Medal
Portal Limit : 9 or less.
Strategy: Place two portals in first room, and two portals to activate the lift via the Ball Catcher. Use two more portals to get on lift. Jump to shorter platform with the red button via the exit door ledge, with Cube in tow. Use two portals to reach the taller platform and be sure to place one of them on the wall near the button. When the blast doors open, fire a portal through it and reuse the portal near the button to exit.
Goal: Silver Medal
Portal Limit : 5 or less.
Strategy: Use two portals to get the Cube to the button in the first room. Then use one portal to get it to the button on the taller platform. Jump to the low button, ignoring the Launcher and Catcher but avoiding the ball, and use two portals to get through the door.
Goal: Gold Medal
Portal Limit: 4 or less.
Strategy: Use two portals to get the Cube to the button in the first room. Use one portal on the wall near the taller platform. Take the first Cube to the taller platform and throw it to the button on the shorter platform (while remaining on the high platform). Use one portal to get through the door.
Steps
Goal: Bronze Medal
Steps Limit: 35 or less.
Strategy: Place a portal at your feet when you exit the elevator and a second portal on the catwalk. Grab the Cube through a portal and throw it onto the red button in the first room. Place a portal on the wall near the button on the taller platform. Jump through next to the cube. Portal the Cube onto the button on the taller platform. Jump to the shorter platform. Place a portal to the exit room. Jump to the elevator.
Goal: Silver Medal
Steps Limit: 25 or less.
Strategy: Place a portal at your feet when you exit the elevator, and a second portal on the catwalk. Grab the Cube through a portal and throw it onto the button. Place a portal on the wall near the button on the taller platform and another on the ground near the Cube. Fall into the floor and grab the Cube on your way. Place it on the button on the taller platform and fire a portal at your feel and another on the ceiling above the button on the shorter platform. Portal through the floor to the exit room and jump to the elevator.
Goal: Gold Medal
Steps Limit: 15 or less.
Strategy: Place a portal at your feet when you exit the elevator, and a second portal on the catwalk. Grab the Cube through a portal and throw it onto the button. Place a portal on the ceiling above blank floor in the second room and one on the ground near the Cube. Fall into the floor and grab the Cube on the way. Portal the Cube to the button on the taller of the elevated platforms. Place a portal at your feet and another on the ceiling above the button on the shorter platform. Portal Floor-to-Floor to the exit room. Keep on Floor-to-Floor bouncing and place a floor portal close to the Emancipation Grid. Hop out near the grid and run to the elevator.
Times
Goal: Bronze Medal
Time Limit: 0:40 or less.
Strategy: Place portals to get you to the first room from the elevator. Portal to the Cube and jump to the button in the first room. Portal to the button atop the taller elevated platform and take the first Cube with you. Activate the Ball Catcher quickly, get the second Cube, and portal it to the button on the shorter platform. Portal to exit.
Goal: Silver Medal
Time Limit: 0:30 or less.
Strategy: Skip the first Cube entirely and portal directly to the button. Then portal through door into the second room. Activate the Ball Catcher quickly, grab the second Cube and portal it to either the tall or short button-platform. Stand on the platform you didn’t choose and portal through the door to the exit.
Goal: Gold Medal
Time Limit: 0:19 or less.
Strategy: Portal to first room from the elevator. Next, portal to the Cube and use it to activate the button in the first room. Portal to either of the button-platforms and take the first Cube with you. Ignore the Ball Catcher and jump to other button-platform while and avoiding the energy ball. Portal through door to the exit.