Borderlands missions flow

Every mission can be completed only if "left" missions have completed. Mission with same level may be played in any order. Side missions are italic.

Arid Badlands
Fresh Off The Bus
 * The Doctor Is In
 * Claptrap Rescue
 * Skags At The Gate
 * Fix'er Upper
 * Blinding Nine-Toes
 * Nine-Toes: Meet T.K. Baha
 * Nine-Toes: T.K.'s Food
 * Got Grenades?
 * Nine-Toes: Take Him Down
 * Nine-Toes: Time To Collect
 * Job Hunting
 * T.K. Has More Work
 * Why Are They Here?
 * T.K.'s Life And Limb
 * By The Seeds Of Your Pants
 * Catch-A-Ride
 * Bone Head's Theft
 * Get A Little Blood On The Tires (Mission)
 * Hidden Journal: The Arid Badlands
 * The Piss Wash Hurdle
 * Claptrap Rescue: The Lost Cave
 * Claptrap Rescue: Safe House
 * Shock Crystal Harvest
 * Return To Zed
 * Sledge: Meet Shep
 * Braking Wind
 * Get The Flock Outta Here
 * Sledge: The Mine Key
 * Scavenger: Sniper Rifle
 * The Legend Of Moe and Marley
 * Circle Of Death: Meat And Greet
 * Circle Of Death: Round 1
 * Circle Of Death: Round 2
 * Circle Of Death: Final Round
 * Sledge: To The Safe House
 * Scavenger: Combat Rifle
 * What Hit The Fan
 * Sledge: Battle For The Badlands
 * Find Bruce McClane
 * Product Recall
 * Insult To Injury
 * Schemin' That Sabotage
 * Leaving Fyrestone

Dahl Headlands
Big Game Hunter Getting Lucky
 * Powering The Fast Travel Network
 * Scavenger: Revolver
 * Fuel Feud
 * Death Race Pandora
 * Ghosts of the Vault
 * Well There's Your Problem Right There
 * Road Warriors: Hot Shots
 * Road Warriors: Bandit Apocalypse

New Haven
Claptrap Rescue: New Haven Corrosive Crystal Harvest King Tossing Claptrap Rescue: Tetanus Warren Like A Moth To Flame Is T.K. O.K.? (You must have completed both T.K.'s Life And Limb and By The Seeds Of Your Pants side missions.) Power To The People
 * Seek Out Tannis
 * Scooter's Used Car Parts
 * Up To Our Ears
 * Firepower: All Sales Are Final
 * Firepower: Market Correction
 * Firepower: Plight Of The Middle Man
 * Jack's Other Eye
 * Scavenger: Submachine Gun
 * Hidden Journal: Rust Commons West
 * Claptrap Rescue: Scrapyard
 * Claptrap Rescue: Krom's Canyon
 * Meet 'Crazy' Earl
 * Today's Lesson: High Explosives
 * Get Off My Lawn!
 * Hair Of The Dog
 * Middle Of Nowhere No More: Investigate
 * Middle Of Nowhere No More: Fuses? Really?
 * Middle Of Nowhere No More: Small Favor
 * Middle Of Nowhere No More: Scoot On Back
 * Circle Of Slaughter: Meat and Greet
 * Circle Of Slaughter: Round 1
 * Circle Of Slaughter: Round 2
 * Circle Of Slaughter: Final Round
 * Altar Ego: Burning Heresy
 * Scavenger: Shotgun
 * Hidden Journal: Rust Commons East
 * Earl Needs Food...Badly
 * Missing Persons
 * Two Wrongs Make A Right
 * The Next Piece
 * Relight The Beacons
 * Claptrap Rescue: Trash Coast
 * A Bug Problem
 * Altar Ego: The New Religion
 * Altar Ego: Godless Monsters
 * Smoke Signals: Investigate Old Haven
 * Smoke Signals: Shut Them Down
 * Bandit Treasure: Three Corpses, Three Keys
 * Bandit Treasure: X Marks the Spot
 * Jaynistown: Secret Rendezvous
 * Jaynistown: A Brother's Love
 * Dumpster Diving For Great Justice
 * Jaynistown: Spread The Word
 * Jaynistown: Getting What's Coming To You
 * Wanted: Fresh Fish
 * I've Got A Sinking Feeling...
 * Jaynistown: Unintended Consequences
 * Jaynistown: Cleaning Up Your Mess
 * Bait And Switch
 * Earl's Best Friend
 * House Hunting
 * Another Piece Of The Puzzle
 * Not Without My Claptrap
 * Claptrap Rescue: Old Haven

Salt Flats
The Final Piece
 * Claptrap Rescue: The Salt Flats
 * Scavenger: Machine Gun
 * Claptrap Rescue: Crimson Fastness
 * Get Some Answers
 * Find The Echo Command Console
 * Reactivate the ECHO Comm System
 * Find Steele
 * Destroy The Destroyer
 * Bring The Vault Key To Tannis

Rust Commons East
Stance Von Kofsky
 * Green Thumb