The Unofficial Patch is not really a mod, but while the default basic patch mostly only fixes bugs, the optional plus patch, that can be choosen at installation, is like a restoration project, adding a lot missing content, including new quests, levels, weapons, items, characters, dialogue, graphics, models, sounds and original music!
Vampire: The Masquerade - Bloodlines Unofficial Patch 10.5
+Renamed Holy Sight to Vision and fixed Divine Light cross texture.
+Added Society icon to title and heat haze effect to fire barrels.
+Restored Faith Heal, discipline particles and Gangrel sheet model.
+Included Velvet's famous private show, many thanks burgermeister.
+Added ladder and food to Society and missing cabbies and manholes.
+Adjusted Dragon's Breath max ammo and made some NPC corpses stay.
+Made Romero's blood refill, and opened King's Way map after quest.
+Removed random whispers in dialogue and gave Lasombra Shin Gunto.
+Corrected female player models for Velvet's dance, thanks DDLullu.
+Fixed Hallowbrook Atrium walls and Giovanni Mansion backtracking.
+Restored two missing XPs to Ocean House quest and two Nines lines.
Fixed Bertram's CD label and added Kamikaze Zen missing passwords.
Made Serial quest independent from Muddy and forced patch folder.
Fixed possible problem if people kill Igor without talking to him.
Restored no Humanity loss for civilians in combat areas to basic.
Added no-more-LOD tool and used it for hunters, thanks to DDLullu.
Fixed Ming's sanctum view, teleport timing and a temple map hole.
Corrected female Tremere lenses and hair problems, thanks DDLullu.
Fixed female Malkavian hair hole, Dane door and cemetery fadings.
Changed impact blood, Chantry endgame locking and haven newspaper.
Updated binkw32.dll to version 1.8x for Linux Wine, thanks dhewg.
Fixed warehouse forklift, door sound and Ocean House lift texture.
Corrected invisible or minor map, file, text and dialogue issues.
Fixed warrens clipping, rat sounds downtown and Mercurio's stains.
Improved some minor texture and model issues, thanks to Psycho-A.