The gameplay for Swap Force is based on the two previous games, Skylanders: Spyro's Adventure and Skylanders: Giants. Players use a portal to bring real-life figures into the video game. For the new game, Skylanders are able to jump, and there are new swappable Skylanders. The new game also brings a new Portal of Power (and therefore is only sold as a starter pack). The new Portal was added because of the new technology that makes the Swap Force characters work correctly. The older portals from the past two games would not be able to sense the top half of these new swappable characters. These sixteen new characters have top and bottom halves that can be separated from each other and recombined with the halves from other characters. This allows for a total of 256 combinations between all tops and bottoms. Another new feature of the swappable characters is that each has one of eight distinct ways of moving. These different movement types are necessary to enter certain side areas in the game called "Swap Zone Challenges". Only characters with the correct bottom half can enter said areas. There are eight: Rocket, Spin, Dig, Stealth, Teleportation, Bounce, Speed and Climb.