There were 292 tags before the final session of UMBA, representing 292 items. Here's a list of ALL of them. The letters used on Tags were simply a book-keeping method so that we could disambiguate duplicate items.
1/2 Bag Monster Treats
1/2 Bag Of Monster Treats
16 Vials of Serum
20% off orders over 5R at Max Taste's Monster House (0689)
20% off orders over 5R at Max Taste's Monster House (3343)
20% off orders over 5R at Max Taste's Monster House (5103)
20% off orders over 5R at Max Taste's Monster House (7244)
20% off orders over 5R at Max Taste's Monster House (7990)
27R Gift Certificate for Brikquid
27R Gift Certificate for Monster House
3 Vials of Serum
3R Nectar Therapy Voucher
3R Voucher for Arena Tickets
54R Gift Certificate for Make-a-Monster
54R Network Bookshop Voucher
84R Gift Certificate for Monster House
9R Monster House Voucher
A Giant Block of Wood Action Figure
Access to GIANT WEAPONS PLATFORM
Another Giant Block of Wood Action Figure
Archaeoroids R
Archaeoroids S
Archaeotech arm brace
Archaeotech Automated Manufacturing Mechanisms
Archaeotech Battery Charge C
Archaeotech Belt G
Archaeotech Black Box with a Remote
Archaeotech Blinking Black Box XXX
Archaeotech box with slot, tray and number pad
Archaeotech Box with slots and coils E
Archaeotech Clamp N
Archaeotech Crank
Archaeotech Cylinder with bullet holes LL
Archaeotech Disk I
Archaeotech Drum
Archaeotech Frisbee P
Archaeotech Frisbee T
Archaeotech Giant Harpoon Gun D
Archaeotech Giant Sponge B
Archaeotech Goggles R
Archaeotech Grey Oval thing with aerials J
Archaeotech Harness
Archaeotech Harness with transparent tubing FF
Archaeotech Hot Pale Orb Alpha
Archaeotech Hot Plate P
Archaeotech Hoverbike SW
Archaeotech Interesting Box with a hole in the middle Mark II AA
Archaeotech Large glass rectangle GF
Archaeotech Large Tube With A Hook H
Archaeotech Laser Gun
Archaeotech Lawnmower K
Archaeotech Light Tube
Archaeotech Light Tube A
Archaeotech Light Tube P
Archaeotech Light Tube P2
Archaeotech Mask C
Archaeotech Mask with box on one side JM
Archaeotech Metal Tube G
Archaeotech Miniature Catapult N
Archaeotech Netting A
Archaeotech Netting D
Archaeotech Nutcrackers
Archaeotech Pen Q
Archaeotech Roller Box $
Archaeotech Round metal container with dial CN
Archaeotech Screen with a Wire S
Archaeotech Shock Whip
Archaeotech Small box with serrated spike TK
Archaeotech Small pointed metal rod XE
Archaeotech Snowglobe LP
Archaeotech Spotlight W
Archaeotech Springboots
Archaeotech Stick
Archaeotech T-Shaped Pipe
Archaeotech Third Arm 4
Archaeotech Tripwire E
Archaeotech Tube V
Archaeotech Umbrella Q
Archaeotech Vial of Serum A
Archaeotech Vial of Serum E
Archaeotech Vial of Serum I
Archaeotech Vial of Serum O
Archaeotech Vial of Serum U
Archaeotech Vial of Serum X
Archaeotech Vial of Serum Y
Archaeotech Werewolf Onesie W
Archaeotech White rod with button on the end IR
Archaeotech Wristwatch F
Archaoetech 6ft Pole P
Archaoetech Arm R
Archaoetech Board A
Archaoetech Green Glowing +
Archaoetech Small Flat White Box with buttons and dials and a screen
Archaoetech Thing with a screen, buttons and antennae W
Armour
Array of glass discs set in a small box
Backpack Launched Monster-Trapping Net C
Ball with a Bell B
Bedazzled Brocade Cape
Big Shiny Red Button
BioDyne Notebook
Black Furry Egg
Bloodstained Booties
Blue Icosohedron Monster Egg
Boo-Boo-B-Gone Long Range Medical Delivery System A
Boo-Boo-B-Gone Long Range Medical Delivery System R
Book
Box o' Omnisquid
Box of Blaze's Possessions
Broken Power Armour
Cable
Cage M
Ceramic Monster Durable Armour adorned with Omega (Damaged)
Chain Link Net A
Cinder Autograph (Crumpled Condition)
Cinder Autograph (Good Condition)
Clicker A
Clicker M
Clicker Mark II Y
Competitors Village Intel O
Competitors Village Intel V
Contract: I promise not to blackmail Arch signed Sprocket
Contract: I'm not allowed to die or Arch will be sad signed Dashboard
Death Scythe
Debt Owed
Doomatros Wing
Doughball Action Figure
Doughnut Action Figure
Dr Petrol
Draft Volcanosaurus Documentary
Explosives K
Extremely Inavisable Jetpack
Fan Competition Trophy
Fatesmith Gift Certificate - Fan Favourite Prize
Fluffy Purple Blanket
Folder: Season XCI
Footsie Thread
Free! Take one :)
Freeze Tank A
Freeze Tank W
Fried Archaeotech Junk
GBOW Egg
Giant Laser Pointer
Giant Sword
Giant Sword N
Gigazaur Gillet
Green Serum Vial G
Gun
Half a bottle of Toxtor Petrol
Hand Jewelry
Hedgehog Spine
Homemade Flamethrower
Huge chunk of Volcanosaurus Meat
Inanimate Carbon Rod
Incriminating Footage Y of Cyclops
Incriminating Letter Q
IOU 90R, Trend
Ivory Pendant
Key DT1
Key DT2
Key FF
Key HW
Key LW
Key NC
Key SS
Key to the Prime Executive's Office
Keys to Hydroponics Building 12
Keys to the Network Offices
Keys to the Vice Executive's Office
Lava Monster Egg
List of Mid-Season Suspects: Chaser, Blanket, Crash, Blade, Pluck, Sprocket, Midnight
Mag-Bow
Magnetic Stones
Mechanical Robot Leg
Megadrenaline
Meltinator A
METROVORE Scrap
METROVORE Scrap
METROVORE Scrap
METROVORE Scrap M
Mid-Season Mansion Key
Middling Quality Booze
Monster Bow
Monster Durable Armour B
Monster Egg Contract between Pluck and Tatters
Monster Fighting Trident A
Monster Hunting Caltrops A
Monster Hunting Rifle and Ammo A
Monster Treats
Monster Treats I
Monster Treats T
Monster-Durable Armour L
Monster-Durable Armour R
Monster-Durable Armour Y
Monster-Fighting Axe X
Monster-Fighting Leather Whip G
Monster-Proof Armour
Monsteropoly Board (Stickers on Volcano Territory (3), The Walls, Competitors Village, The Vault [SET! Signed], Commentator's Box (2), Hydroponics Building 8)
Monsteropoly Stickers for Competitors' Village, The Walls, Volcano Territory
Monsteropoly Stickers for MTMH, Southern Cliffs, Arena Bar
Monsteropoly Stickers for South Stands; MTMH; Monster Pens
Monsteropoly Stickers: MTMH, Competitors Village, The Moon
Monsteropoly Stickers: Volcano Territory, Arena Bar, South Stands
Mouldy Burger
Murder Plans C
Mycosaurus Shrooms
Neopolitan Monster Egg
Note from Cinder “Give 'em hell! - Cinder x”
Note from Cinder to Pluck
Note from Cinder to Saffron
Note from Cinder to Sprocket
Note: XNIJ = 108RR RRRRR
Omnisquid Tentacle
Ornamental Stones
Oven Gloves
Piece of paper that reads “Omega 22:9” signed by Fatesmith
Pile of unsorted Archaeotech
Pitch black and faintly humming Monster Egg
Poison Sample
Pot Plant
Power Pack
Prime Executive Schematics
Radiation Protective Suit
Random Assortment of Archaeotech Crap
Razor-Sharp Blades X
Revolver
Revolver Rounds (20)
Rocket Launchers
Saddle Bag
Salts and Metals for throwing into flames
Season W Folder
Semi-Circular Archaeotech Device G
Semi-Circular Archaeotech Device R
(SHELL) Black Monster Egg that glows blue where you touch it
(SHELL) Black Monster Egg that glows green where you touch it
(SHELL) Bright Vivid Purple Egg
(SHELL) Green-Blue Stress Ball Monster Egg
(SHELL) Heavy Monster Egg
(SHELL) Ice Monster Egg
(SHELL) Icy Egg that emanates Cold
(SHELL) Mirrored Monster Egg
(SHELL) Mottled Green Monster Egg
(SHELL) Rock like spiky warm glowing orange Monster Egg
(SHELL) Rocky Monster Egg
(SHELL) Soft Furry Monster Egg
(SHELL) Warm Pink Heart-Spotted Monster Egg
(SHELL) Warm Yellow Monster Egg
Shrapnel! Q
Shrapnel! R
Shrapnel! S
Small Rectangular Archaeotech Slate displays markings when touched N
Spam Flyer
Spear A
Special 27R
Squarish Copper Egg
Swimsuit Elasticated White Fabric SA
Swimsuit Elasticated White Fabric SC
Swimsuit Elasticated White Fabric SD
Swimsuit Elasticated White Fabric SE
Swimsuit Elasticated White Fabric SF
Swimsuit Elasticated White Fabric SH
Swimsuit H
Swimsuit SA
Swimsuit SB
Swimsuit SC
Swimsuit SD
Swimsuit SE
Tarnished Metal Slivers
Tech Monster Head
Thunder Hammer
Ticket to meet Tornado of Tornado and the Storms
Tiny Gleaming Crystal
Tiny Wooden Puppet on Purple Strings N
Tiny Wooden Puppet on Purple Strings W
Todo List's Will
Turret Mounting Backpack
Used Hyper Armour
Useless Yellow Metal
Very Dangerous Electric Whip Thing + Gloves
Vial of Serum
Volcanosaurus Plushie
Volcanosaurus Pumice
Wasteland Brandy
Wasteland Map
Wasteland-Woven Fabric
Will in a Bottle C
Woolen Earplugs
Woolen Earplugs Alpha
Worthless Yellow Metal x 3
Xenon Vial F
Xenon Vial R
Xenon Vial S