Treehouse of Horror XXXIV Event was the 5th multi-event of 2023 and the 29th multi-event overall. It was released on October 4, 2023, one week after the conclusion of A Hard Play's Night 2023 Event and ended on November 15, 2023. It is the 12th Treehouse of Horror event overall, and the final one.
Similar to previous multi-events, it was divided into four acts:
- Act 1: October 4, 2023 - November 15, 2023
- Act 2: October 13, 2023 - November 15, 2023
- Act 3: October 22, 2023 - November 15, 2023
- Act 4: October 31, 2023 - November 15, 2023
Quests[]
| Main Quests | Whole Event | Encounters of the Not-Very-Spooky Kind · Just Wait Till Next Year, |
|---|---|---|
| Act 1 | The Horror Happening, | |
| Act 2 | Plants vs. Karate, | |
| Act 3 | The Monsters Mash, | |
| Act 4 | The Human League of Humans, | |
| Side Quests | Whole Event | A Special Message From Kang and Kodos, · Now You See Me, · Speak No Evil, |
| Act 1 | The Not-Giving-A-Rip Tree, | |
| Act 2 | Drac on Drac Violence, · Howl of the Wild, | |
| Act 3 | Back on the Chainsaw Gang, · Shinobi-Dooby-Doo, · Stone-Faced Killer, | |
| Act 4 | Flame Off, · Holy War Throwdown, |
New Content[]
Buildings[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Monster Business School |  155
|
Act 2 Prize |
| Old Country House |  115
|
Act 3 Prize |
| Carnival Haunted House | 155
|
Act 3 Prize |
| Springfield STEM Academy |  155
|
Act 4 Prize |
| US Military Holding Facility | 155
|
Act 4 Prize |
| Springfield Christmas Tree Farm |  150
|
Whole Event |
| Transylvanian Shaolin Monastery | 150
|
October 13 - November 15 |
| Parthenon | 150
|
October 22 - November 15 |
| Mixed Martial Arts Mega Church | 150
|
October 31 - November 15 |
Characters[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Taekwon Dracula | 195
|
Act 2 Prize |
| Mighty Oak Leader | Springfield Christmas Tree Farm | Whole Event |
| Kung Fu Werewolf | Transylvanian Shaolin Monastery | October 13 - November 15 |
| Ninja From the Black Lagoon | Swamp Land | October 22 - November 15 |
| Mixed Martial Medusa | Parthenon | October 22 - November 15 |
| MMA Jesus | Mixed Martial Arts Mega Church | October 31 - November 15 |
| Alien Bart | Tray of 132 Donuts | Whole Event |
Outfits[]
| Name | Character | Cost/How to Unlock | Available |
|---|---|---|---|
| Chainsaw Willie | Willie | 195
|
Act 3 Prize |
| Monster Hunter Homer | Homer | 195
|
Act 4 Prize |
Decorations[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Alien Portal Device |  155 (1st)
|
Act 1 Prize |
 25 (2nd+)
|
Whole Event | |
| Alien Pod Field | 155 (1st)
|
Act 1 Prize |
| 30 (2nd+)
|
Whole Event | |
| Alien Bush | Alien Flora Bundle (1st) | Act 1 Prize |
| 20 (2nd+)
|
Whole Event | |
| Alien Flower 1 | Alien Flora Bundle (1st) | Act 1 Prize |
| 20 (2nd+)
|
Whole Event | |
| Alien Flower 2 | Alien Flora Bundle (1st) | Act 1 Prize |
| 20 (2nd+)
|
Whole Event | |
| Alien Flower 3 | Alien Flora Bundle (1st) | Act 1 Prize |
| 20 (2nd+)
|
Whole Event | |
| Alien Pod Tree 1 | Alien Flora Bundle (1st) | Act 1 Prize |
| 20 (2nd+)
|
Whole Event | |
| Alien Pod Tree 2 | Alien Flora Bundle (1st) | Act 1 Prize |
| 20 (2nd+)
|
Whole Event | |
| Alien Pod Tree 3 | Alien Flora Bundle (1st) | Act 1 Prize |
| 20 (2nd+)
|
Whole Event | |
| Angry Christmas Trees | 115 (1st)
|
Act 2 Prize |
| 30 (2nd+)
|
October 13 - November 15 | |
| Alien Control Center | 155
|
Act 2 Prize |
| Alien Spore Cannon | 155 (1st)
|
Act 2 Prize |
| 30 (2nd+)
|
October 13 - November 15 | |
| Itchy & Scratchy Rocket | 155
|
Act 3 Prize |
| Burns' Escape Pod | 155
|
Act 3 Prize |
| US Army Alien Hunting Helicopter | 155 (1st)
|
Act 4 Prize |
| 30 (2nd+)
|
October 31 - November 15 | |
| Swamp Land | 150
|
October 22 - November 15 |
Façades[]
| Name | Building/Decoration | Cost/How to Unlock | Available |
|---|---|---|---|
| Monster Treehouse | Bart's Tree House | 195
|
Act 1 Prize |
| Springfield Tire Yard Secret Lair | Tire Fire | 155
|
Act 4 Prize |
Consumables[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Treehouse of Horror XXXIV Mystery Box |  1
|
Whole Event |
| Alien Flora Bundle | 155
|
Act 1 Prize |
Returning Content[]
Buildings[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Cursed Tomb | 145
|
Whole Event |
| Death Mountain | 120
|
Whole Event |
| Heavenly Swing Set | 150
|
Whole Event |
| Monster's Castle | 160
|
Whole Event |
| Count Burns' Castle | 70
|
Whole Event |
| Dracula-la Land | 80
|
Whole Event |
| House on Scary Hill | 90
|
Whole Event |
| Large Mausoleum | 90
|
Whole Event |
| Mausoleum | 60
|
Whole Event |
| Spooky Cabin | 50
|
Whole Event |
| Transylvania Chalet | 60
|
Whole Event |
| Transylvania Cottage | 30
|
Whole Event |
Characters[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Amenhotep | Cursed Tomb | Whole Event |
| Dr. Colossus | Death Mountain | Whole Event |
| Frankenstein's Monster | Monster's Castle | Whole Event |
| Itchy | FREE
|
Act 3 |
| Julienstein | Monster's Castle | Whole Event |
| Jesus Christ | Heavenly Swing Set | Whole Event |
| Beatrice | Springfield Cursed Forest | Whole Event |
| Blinky Monster | Scary Dock | Whole Event |
| Bridge Troll Moe | Deep Dark Woods | Whole Event |
| Nosferatu | Cursed Ship | Whole Event |
| Werewolf | Howl Hill | Whole Event |
| Cloakie | Monster Minion Bundle | Whole Event |
| Shuffles | Monster Minion Bundle | Whole Event |
| Wearywolf | Monster Minion Bundle | Whole Event |
| Xylem | Xylem Bundle (with Pod Patch) | Whole Event |
| FREE (alone)
|
Whole Event | |
| Clawing Zombie | 25
|
Whole Event |
| Count Dracula | 75
|
Whole Event |
| Death | 70
|
Whole Event |
| Disco Zombie | 30
|
Whole Event |
| Helter Skeleter | 25
|
Whole Event |
Outfits[]
| Name | Character | Cost/How to Unlock | Available |
|---|---|---|---|
| Count Grampa | Grampa | 60
|
Whole Event |
| Mummy Wiggum | Wiggum | 60
|
Whole Event |
| Were-Milhouse | Milhouse | 60
|
Whole Event |
| Werewolf Flanders | Flanders | 65
|
Whole Event |
Decorations[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Pod Patch | Xylem Bundle (with Xylem) | Act 1 Prize |
| FREE (alone)
|
Whole Event | |
| Cursed Ship | 150
|
Whole Event |
| Deep Dark Woods | 150
|
Whole Event |
| Howl Hill | 145
|
Whole Event |
| Scary Dock | 150
|
Whole Event |
| Springfield Cursed Forest | 150
|
Whole Event |
| Ancient Burial Ground | 40
|
Whole Event |
| Bone Pile | 15
|
Whole Event |
| Flying Bats | 20
|
Whole Event |
| Fogbury Cemetery | 70
|
Whole Event |
| Foggy Swamp | 35
|
Whole Event |
| Frontier Cemetery | 40
|
Whole Event |
| Gallows | 60
|
Whole Event |
| Haunted Stables | 30
|
Whole Event |
| Homer's Grave | 20
|
Whole Event |
| Mortician Carriage | 40
|
Whole Event |
| Skinner Sarcophagus | 50
|
Whole Event |
| Stairway to Hell | 60
|
Whole Event |
| The Shinning Maze | 40
|
Whole Event |
| Vampire Casket | 20
|
Whole Event |
| Wolf Rock | 50
|
Whole Event |
Façades[]
| Name | Building/Decoration | Cost | Available |
|---|---|---|---|
| Krusty Murder | Krusty Burger | 60
|
Whole Event |
| Moe's Terror | Moe's Tavern | 60
|
Whole Event |
| Scream-son House | Simpson House | 60
|
Whole Event |
Consumables[]
| Name | Cost/How to Unlock | Available |
|---|---|---|
| Monster Minion Bundle | 50
|
Whole Event |
| Xylem Bundle | 115
|
Act 1 Prize |
Personal Prizes[]
Act One[]
| Prize | Quest | Alien Fruits Needed |
|---|---|---|
| 1* OR Xylem Bundle*
|
The Horror Happening, Pt. 1 | 115
|
| Alien Portal Device | The Horror Happening, Pt. 2 | 155
|
| Alien Pod Field | The Horror Happening, Pt. 3 | 155
|
| Alien Flora Bundle | The Horror Happening, Pt. 4 | 155
|
| Monster Treehouse | The Horror Happening, Pt. 5 | 195
|
*If the player owns Pod Patch and Xylem, they will get the Treehouse of Horror XXXIV Mystery Box Token.
Act Two[]
| Prize | Quest | Plastic Fangs Needed |
|---|---|---|
| Angry Christmas Trees | Plants vs. Karate, Pt. 1 | 115
|
| Monster Business School | Plants vs. Karate, Pt. 2 | 155
|
| Alien Control Center | Plants vs. Karate, Pt. 3 | 155
|
| Alien Spore Cannon | Plants vs. Karate, Pt. 4 | 155
|
| Taekwon Dracula | Plants vs. Karate, Pt. 5 | 195
|
Act Three[]
| Prize | Quest | Hand Axes Needed |
|---|---|---|
| Old Country House | The Monsters Mash, Pt. 1 | 115
|
| Carnival Haunted House | The Monsters Mash, Pt. 2 | 155
|
| Itchy & Scratchy Rocket | The Monsters Mash, Pt. 3 | 155
|
| Burns' Escape Pod | The Monsters Mash, Pt. 4 | 155
|
| Chainsaw Willie | The Monsters Mash, Pt. 5 | 195
|
Act Four[]
Trivia[]
- Most of the event's theme and new content is based on Season 2, Episode 19 "Lisa's Substitute", Season 5, Episode 3 "Homer Goes to College", Season 5, Episode 15 "Deep Space Homer", Season 7, Episode 15 "Bart the Fink", Season 19, Episode 5 "Treehouse of Horror XXVII" segment "E.T., Go Home", Season 24, Episode 21 "The Saga of Carl", Season 30, Episode 1 "Bart's Not Dead", Season 30, Episode 4 "Treehouse of Horror XXIX" segment, "Intrusion of the Pod-y Switchers", Season 30, Episode 15 "101 Mitigations", Season 30, Episode 21 "D'oh Canada", Season 31, Episode 4 "Treehouse of Horror XXX" segment "Danger Things", Season 31, Episode 12 "The Miseducation of Lisa Simpson", and Season 33, Episode 3 "Treehouse of Horror XXXII" segment, "Nightmare on Elm Tree".
- An app store update was released on October 15, 2023 and made the following changes:
- The event's end date was extended by a week which changed from November 8 to November 15.
- 2 Treehouse of Horror XXXIV Event Mystery Box Tokens were given to IOS players because of connection issues.
- Pod Patch or Xylem was given to players for free in the store that completed The Horror Happening, Pt. 1 if they didn't already own one of them.
- An app store update was released on October 23, 2023 and made the following change:
- Itchy was given to players free if they didn't already own him.
- Direct update was released on Nevember 13, 2023 and made the following change:
- The monsters released on this event were made eligible to Monster Hunter Homer's last part of the personal quest.
Gallery[]
The event's app icon.
Treehouse of Horror XXXIV Event Guide.
Treehouse of Horror XXXIV Event End Screen.
Treehouse of Horror XXXIV Event Store Panel.
Kang and Kodos Special Reward message.
Treehouse of Horror XXXIV Event Thank You for your patience message.
2 Mystery Box Tokens message.
Xylem being offered for free in the store.
24 Donut Pack Reward message.
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