A simple test to get you warmed up to thinking with portals... If you can't do this, then you don't deserve to play this game....

A slightly more complicated test from the last, but should still pose no problems....

Not a terribly complex test. But it is essential that you time things right....

Now we're getting into the real stuff. It may take you a minute to get this one....

Think defensively on this map as a wrong move could leave you in hot water....

Face this test head on and battle your way to the exit....

This test will surely pose a significant challenge. Don't get too frustrated. Goodluck!...