Save the Guardians from the Scav Poachers.
Deliver Zarpedon's message.
Defeat the Empyrean Sentinel.
Defeat the Opha Superior.
Suffocate for 5 continuous minutes without dying.
Complete the mission "Return of Captain Chef".
Reach level 25.
Complete the mission "Eye To Eye".
Complete the mission "Watch Your Step".
Launch 4 rockets from Elpis.
Complete the mission "Science And Violence".
Complete 30 side missions.
Complete the mission "Home Sweet Home".
Complete the mission "Let's Build A Robot Army".
Complete the mission "To Arms".
Pancake an enemy in the Stingray.
Open Zarpedon's Chest.
Complete the mission "Intelligences Of The Artificial Persuasion".
Kill 100 enemies with Wolf.
Use the Grinder to create an item.
Complete the mission "A New Direction".
Reach level 10.
Complete the mission "Systems Jammed".
Complete the mission "Marooned".
Unlock 10 Customization Items.
Reach level 5.
Complete the mission "Lost Legion Invasion".
Remove Excalibastard from the stone.
Complete the "Sub-Level 13" missions with 3 other players.
Complete all of the side missions.
Defeat the Invincible Empyrean Sentinel.
Revive 10 players with oxygen.
Kill 100 enemies with the Aspis.
Experience all Vault Hunter Modes using Vault Hunter.EXE.
Kill 10 enemies in a single activation of Showdown.
Have Purple-rated gear or better equipped in every slot.
Complete level 1 of all challenges with a single character.
Reach level 50.
Try all the Moxxtails in the Up Over bar in Concordia.
Loot 10 Moonstone Chests.
Discover all named locations in Serenity's Waste, Triton Flats and Stanton's Liver.
Discover all named locations aboard the Helios Space Station.
Discover all named locations in Outlands Canyon, Outlands Spur and Vorago Solitude.
Discover all named locations.
Win a duel.
Have a Lost Legion Eternal kill 3 of his friends.
While airborne, spin 360 degrees then get a kill with a Sniper Rifle without using the scope.
Use the Grinder to create a Legendary item.
Shatter 3 frozen enemies with a single slam attack.
Have an enemy frozen, corroded, ignited, and electrocuted at the same time.
Complete all 5 rounds of The Holodome.
Complete the Badass Round of The Holodome.
Complete the Badass Round without going into Fight For Your Life.
Digitize into Claptrap's Brain.
Destroy the Tassiter Proxy.
Successfully recover the Override Key.
Give the H-Source to Jack.
Defeat 5H4D0W-TP.
Outrun the Wheel in the Temple of Boom.
Talk to all of Claptrap's Holographic Projections.
Experience all 9 Game Modes and all 9 Modifiers of the Mutator.
Complete a round using the Mutator.
Kill 10 SpyBugs before they take your photo.