Portal had won numerous accolades, and if I had to describe what kind of game it is, it’s a puzzle game, and as many puzzle games, it’s also a platformer. It’s a 3D platformer, but that’s not entirely new, as there had been Rayman 3(D) before. It’s also a first person platformer, which is slightly rarer. Here is a 2D platformer flash based version of Portal someone made online. The maps from this version were later added to the actual game.
Portal, is a game that in a way is based on the physics engine of Half-Life 2, and is a game where you have two weapons: Your wits, and the portal gun. Do try to keep your wits about you. Your Portal Gun (Aperture Science Handheld Portal Device) is capable of shooting two portals, one for entry and one for egress. You can easily cross chasms or walls in this manner, or leap a great distance forward.