A 2K release said: "Combining invention and evolution, Borderlands 2 features all-new characters, skills, environments, enemies, weapons and equipment, which come together in an ambitiously crafted story. Players will reveal secrets, and escalate mysteries of the Borderlands universe as they adventure across the unexplored new areas of Pandora.
Environments will be more diverse and enemies will be smarter, says 2K, plus Gearbox is planning an improved mission system "capable of delivering a better story".