Borderlands 2 is coming to Vita next week. As a result of being on the handheld system, the experience is being altered and slimmed down in some ways, from changed control inputs to the number of players in co-op.
The PlayStation Blog explains the changes. By default, different areas of the rear touch pad are used for sprint and melee, while the touch screen tosses grenades or activates character abilities. L and R shoot, but the gyroscope lets you move the PSP itself to adjust your aim too. The controls are customizable, though, so you can go into the options menu to set your own scheme.
Co-op is capped at only two players rather than the four on console versions. And the blog notes that the game on the whole is "generally hovering in the vicinity of 30 frames per second."
It's not all bad news, though. The Vita version supports cross-save from the PlayStation 3 version, so you can import your existing characters. Plus, it will include the two characters added to the console post-launch (Gaige and Krieg), along with the Captain Scarlett and Mr Torgue DLC packs, the Vault Hunter Upgrade pack, and the Collector's Edition pack.