Get ready for the mind blowing insanity! Play as one of four trigger-happy mercenaries and take out everything that stands in your way! With its addictive action, frantic first-person shooter combat, massive arsenal of weaponry, RPG elements and four-player co-op, Borderlands is a breakthrough experience that challenges all the conventions of modern shooters.

Guides
Borderlands – Camera Spin Fix
How to Fix Go to Borderlands > Engine > Config Then go to the base engine and go down to CameraRotationThreshold=45.0 and set it to CameraRotationThreshold=0 And its fixed!