Do or Die is a challenge in Lynchwood. To achieve it, Vault Hunters have to find four ECHO recordings scattered throughout the town which detail the reasons for Axton to come to Pandora. This challenge is worth 5 Badass Rank.
ECHO 1: The first ECHO is inside a waste container by Lynchwood Station.
ECHO 2: The second ECHO can be found on the rooftops in the northern part of Main Street.
ECHO 3: The third ECHO can be found on the left side of a platform by the sheriff's office on Gunslinger's Corner.
ECHO 4: The fourth ECHO can be found inside a van across from the Marcus Munitions at the top end of Gunslinger's Corner. (Note: Chronologically, ECHO 4 is actually the 3rd recording.)