Several multi-colored doors will appear in front of your hero in the Portals game, and these are not just doors, but portals to different worlds. Choose any of them you like and dive into it. Each world has its own characteristics and conditions. Most often you are asked to simply survive, although at first glance the world may seem calm, peaceful and nice. However, dangers can lurk at any time and in any place. Unfamiliar locations hide a lot of surprises and most often they carry mortal danger, so always be on your guard in Portals, no matter where you find yourself.
