What we know:

Borderlands was a surprising hit in 2009 and Gearbox is hoping to deliver another impressive and addictive game this year with a sequel that takes players back to Pandora and refines all the significant gameplay mechanics.

For starters, the four character classes we know from the original are gone, replaced by a whole new mix, two of which are known at the moment.

Gearbox has repeatedly said that their main aim is to create an entirely new dynamic, with roles that are harder to master but at the same time offer more variety in terms of potential builds.