WARNING: the update application will take about two hours to complete.
This really sucks and I don't care.

This is Borderlands 2 standalone version '1.8.3 (119950 steam)' Update 9, up to date as of July 18, 2014.

Additional characters available (all tested):
 - Mechromancer Pack: Available when you choose a character class.
 - Psycho Pack: Available when you choose a character class.

Additional maps available (all tested):
 - Creature Slaughter Dome: Entry at the far east of "Wildlife Exploitation Preserve".
 - Captain Scarlett and her Pirate's Booty: Fast Travel to "Oasis".
 - Mr. Torgue's Campaign of Carnage: Fast Travel to "Badass Crater of Badassitude".
 - Sir Hammerlock's Big Game Hunt: Fast Travel to "Hunter's Grotto".
 - Tiny Tina's Assault on Dragon Keep: Fast Travel to "Unassuming Docks".

Additional Head Hunter maps available (all tested):
 - TK Baha's Bloody Harvest: Fast Travel to "Hallowed Hollow".
 - The Horrible Hunger of the Ravenous Wattle Gobbler: Fast Travel to "Gluttony Gulch".
 - How Marcus Saved Mercenary Day: Fast Travel to "Marcus's Mercenary Shop".
 - Mad Moxxi and the Wedding Day Massacre: Fast Travel to "Rotgut Distillery".
 - Sir Hammerlock vs. the Son of Crawmerax: Fast Travel to "Wam Bam Island".

Level cap increases available (all tested):
 - Ultimate Vault Hunter Upgrade Pack: Finish the game in "True Vault Hunter Mode" and have your character reach level 50, the new "Ultimate Vault Hunter Mode" will be available.
 - Ultimate Vault Hunter Upgrade Pack 2: Fast Travel to "The Raid on Digistruct Peak". Each time you complete this map at level 72, you’ll receive an additional overpower level, up to a maximum of eight.

Additional appearance customizations available (all tested):
 - All 18 Madness, Supremacy and Domination for Assassin, Commando, Gunzerker, Mechromancer, Psycho and Siren Packs (collectively known as Costume Pack)
 - Assassin Stinging Blade, Commando Haggard Hunter, Gunzerker Dapper Gent, Mechromancer Steampunk Slayer, Psycho Dark Psyche, Siren Glitter and Gore Packs (collectively known as Costume Pack 2)
 - Assassin Cl0ckw0rk, Commando Devilish Good Looks, Gunzerker Greasy Grunt, Mechromancer Beatmaster, Psycho Party, Siren Learned Warrior Packs (collectively known as Costume Pack 3)
 - Poker Night 2 customizations,
 - Diamond Loot Chest Edition customizations.
 - Community Day 2013 customizations
 - Ultimate Vault Hunter Upgrade Pack 2 customizations
 - Prequel customizations

Additional items available (all tested):
 - From the Premiere Club Pack: characters get the Vault Hunter's Relic and Gearbox GunPack. Plus, you get 255 Golden Keys instead of a measly single one!
 - From the Collector's Edition Pack: Contraband Sky Grenade.

Other changes (all tested):
 - When opening the loot chest in Sanctuary, you don't spend a Golden Key (but you still need one). Now you can loot that golden chest as often as you want.
 - Complete English, French, German, Italian and Spanish localizations are included. Language is automatically selected from your 'Language & Region' system preference pane.
 - Standalone version: no Steam connection required.