Quenchables: Borderlands 2 Doubles Size Of Original

“wouldn’t be surprised if it was about 50-60% bigger [than Borderlands 1]. It’s also so much denser. Heck, just the city of Sanctuary, something like that couldn’t exist in the first game. Our technology has evolved a lot to enable us to do that now.” – Gearbox VP Steve Gibson speaking in an interview with Game Master Magazine, via CVG.