First of seven maps aimed to challenge you in the aspects of quick shooting and proper timing. In this map you should drive a ball through a maze of vents....

Second of seven maps aimed to challenge you in the aspects of quick shooting and proper timing. In this map you should get through the doors and the fizzler between them. Tip: The cube button controls both the fizzler and the doors....

Third of seven maps aimed to challenge you in the aspects of quick shooting and proper timing. This map is a remake of a map every average portal player will recognise. It's aim is to teach you about the new test mechanic....

Fourth of seven maps aimed to challenge you in the aspects of quick shooting and proper timing. In this map you have to be really quick and look around before you do something you'll regret....

Fifth of seven maps aimed to challenge you in the aspects of quick shooting and proper timing. Here you meet a rotating light bridge and an old friend - the Aperture Science High Energy Pellet. It's time to increase the mental challenge a bit....

Sixth of seven maps aimed to challenge you in the aspects of quick shooting and proper timing. You have 3 entrances to the same room where you'll find a new type of field - Material Repulsion Field, which is purely aesthetic. Choose your entrance well....

Last of seven maps aimed to challenge you in the aspects of quick shooting and proper timing. Gotta go up and down but wait ... where is that energy ball supposed to go. Including: - Slow Motion moment...