The first is to find the source the second - small bases with their own oxygen generators. On Ellis, there are several opportunities to replenish oxygen supplies.
The main problem in the game is the lack of oxygen. At that time his name was - John - and he was the simplest person who dreamed of finding an artifact. The main antagonist - Handsome Jack - works as a simple programmer on Ellis. The story of the creation of 'Hyperion' is told in a first-person shooter - Borderlands: The Pre-Sequel.
