This is a difficult map in which the key is to avoid losing momentum, and/or to gain extra momentum. The pneumatic diversity vent also makes an appearance. There is also a vacuum tube that you can ride. If you get stuck in the tube, try ducking! (This is a...

This difficult puzzle involves lasers, light bridges and an edgeless safety cube. Warning: Involves extreme lighting conditions. Note: The little tunnel serves as a reset button. Press the button, and you'll be given option to return the beginning of the p...

This map, set in 1980s, is about breaking the barriers. NOT required: Glitches, or crazy accurate maneuvers (such as portal placement mid-air). But there are one or two points where you must act without hesitation. A complimentary pit of goo is provided fo...

Let's test what happens when we immerse spheres in various liquids! This is actually quite a difficult test, but it does not require good reflexes....

Defeat Hercules! Tips for solution: What you need: Lateral thinking. What is NOT necessary: Glitches, fast reflexes, well trained maneuvers. An annotated walkthrough video is available at: http://www.youtube.com/watch?v=vFB0WqLXSW0 HINT for the beginning: ...

Light bridges appear in this one. One or two thinking-out-of-box actions (not glitches) may be required to solve this puzzle efficiently... If you cannot figure it out, here's a walkthrough video: http://www.youtube.com/watch?v=e7zA_GPr5zY #F4F #BEEMOD...

Finding the right orientation solves the puzzle. Note: You do not need luck. There are at least two perfectly reliable ways to do this and get it every time. #F4F...

A rather trivial map. If you accidentally get stuck in one of the angled panels as it moves (should be unlikely, but is possible), you need to restart the map. Sorry about that. Glitches are NOT REQUIRED for completion. (Previously they were.) You need: Lo...

A simple fling challenge (quite difficult actually), followed by a more difficult fling challenge, followed by an impossible fling challenge... or is it? Walkthrough video: http://youtu.be/H8ZbIAFVZo8 (newest version, played without cheats) Walkthrough vid...

IMPORTANT: You must utilize a glitch to solve this puzzle. But dear miss, there is no such thing as “gravity”. Where do you always get such silly ideas? Size: SMALL Difficulty level: HARD Glitches required: YES Fast reactions / good coordination required: ...

A very difficult map. Solution involves game mechanics not used in normal playing. There is also minimal degree of physics randomness. Try again if needed. Correct solution does NOT involve glitches such as funnel-flying. IMPORTANT: There is a bug in the g...