Players solve puzzles by using these portals to move unconventionally between rooms or to use the ability to fling objects or themselves across a distance. After these levels, the player will be required to solve puzzles in test chambers within the Aperture Science Enrichment Center using the 'portal gun' (the Aperture Science Handheld Portal Device), a device that can create two portals connecting two surfaces across space. Initial levels provide a tutorial on general movement controls and interactions with the environment. The goal is to maneuver the characters through a number of test chambers in the Aperture Science facility and traverse the level from the start to the exit. Normally, the player, as either Chell in the single-player campaign or as one of two robots, Atlas or P-body, in the co-operative campaign, can move, look, and carry and drop objects.
Portal 2 is a puzzle game presented from the first-person perspective.
