The game of thinking with portals gets remade into a 2D side scroller! The laws of physics and everything you know about moving around a level are changed thanks to the Aperture Science Handheld Portal Device, or ASHPD. With the use of portals, you will have to think way outside of the box and figure out how to get from one spot to another. Keep in mind that inertia carries through a portal - that is, jump in a portal from up high, you will be ejected from the other portal with tremendous velocity - keep this in mind when trying to cross large gaps. Move around your character with the W A S D keys and aim the cursor with your mouse, and click to fire a portal. First you will fire a blue portal, and then a yellow one. Put your critical thinking skills to the test in this highly challenging and super fun game that will force you to think outside of the box!