"The people of Springfield are ignoring Reverend Lovejoy's sermon and speculating on what crazy things are going to happen this Halloween. However, all of their ideas sound lame to Bart, so he clandestinely uses Professor Frink's new Deep Space Social Media Transmitter to try to entice the Ki-Ya Karate Monsters to come to Earth...by insulting them. Unfortunately, his message is received by the Xylem, who come to Earth and try to take over Springfield with monster trees. Before that situation sorts itself out, the Karate Monsters finally show up, angry about being dissed and looking to fight everyone and everything in Springfield. When Ned Flanders prays for salvation, a Mixed Martial Arts-obsessed Jesus is not what he expected, but maybe a two-fisted Son of God really will finally save Springfield!"
―Event description
Splash screen.App icon.Store panel.
Treehouse of Horror XXXIV is the two hundred forty-first content update of The Simpsons: Tapped Out. It started on October 4, 2023 and ended on November 15, 2023. It was the twelfth and final "Treehouse of Horror" update for the game.
You know what's classier than sleeping in an alley under a roll of thrown-out carpeting? The Parthenon!
And if you snap this offer up now, Mixed Martial Medusa will redecorate with new statues!
I agreed to no such thing! I said I would turn YOU into a statue!
Sounds like a better life than I've been pulling off. Statue me, sister!
If the offer is accepted
Excellent! Now I can fight Gil to prove my dominance!
Fight me?! I didn't agree to that!
You were not part of the discussion.
I never am.
If the offer is rejected
The Parthenon doesn't do it for you? Wait, don't go — I've got other classics I can sell! The Brooklyn Bridge? Some land in a place called Death Valley?
Old Country House, Carnival Haunted House, Alien Portal Device
Indolence
10
Alien Control Center, Alien Spore Cannon, US Army Alien Hunting Helicopter
Obedience
5
US Military Holding Facility
10
Transylvanian Shaolin Monastery
Righteousness
10
Mixed Martial Arts Mega Church, Parthenon
20
Springfield STEM Academy
Socialism
10
Alien Pod Field, Alien Pod Tree 1, Alien Pod Tree 2, Alien Pod Tree 3, Alien Bush, Alien Flower 1, Alien Flower 2, Alien Flower 3, Angry Christmas Trees,
October 15 Update (4.64.2; "v4_64_THOHXXXIV_PATCH1")[edit]
The event end date was changed from November 8 to November 15.
If the player is on iOS, 2 were awarded to them due to connection issues and downtime.
Xylem and the Pod Patch are available for free from the Store if the player has completed The Horror Happening, Pt. 1 but doesn't own one of them.
October 23 Update (4.64.3; "v_4_64_THOHXXXIV_PATCH4")[edit]
If the player has started The Monsters Mash, Pt. 1 and doesn't own Itchy, Itchy will be available for free from the Store.
Scratchy's temporary quest "Try to Ditch the Earth" was changed to require both Scratchy and Itchy to get it.
October 24 Update ("v4_64_THOHXXXIV_PATCH2")[edit]
A new quest called "Technically Fixed" was added which rewards the player with 60 for putting up with all the game's technical issues during the event.
Act 2: "Plants vs. Karate" rewards were doubled. Regular characters now earn 10 currency whilst premium characters earn 16.
November 13 Update ("v4_64_THOHXXXIV_PATCH5")[edit]
All Monsters now count towards the "Run for Their Lives" job and the quest checks to see if the player has any Monsters to give the task.
30 in the Yearbook Mystery Box!
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2 were awarded to them due to connection issues and downtime.
Overview at Tapped Out - Update Information