The Simpsons: Tapped Out Bart Royale and Valentine's Day 2018 content update/Bart Royale

"Just like your parents’ marriage, the magic has left Springfield. The beasts are tamed, the evil sorcerer defeated, and the magical school is back to just… school. It’s time to put away the wands, spell books, and potions and return to a life of magic-less monotony. But what’s next for your town? An alien immigration? The return of the masonic messiah? Or maybe a generational division of lowest common denominators! Stay tuned for more characters, buildings and stories coming soon!"

- Event teaser description on app store.

"It’s a battle for the ages! Wait, we mean a battle of the ages – kids and adults are at war in Springfield! But what could cause this generational divide – Unfair bedtimes? Too many vegetables? Territory rights to the town’s new playground? (That last one was so specific it has to be true). Can Bart lead the youths to victory over Homer’s aged army and claim Springfield’s new Mega Playscape? Gather your troops, fortify your structures, and see saw your seesaws. It’s time for war."

- Event description on app stores.

The Simpsons: Tapped Out Bart Royale is the main event of the update and was released on January 23rd, 2018. It was teased in the update. It added 6 new characters, 3 new building-character combos, 2 new decoration-character combos, 3 new character skins, 2 new building-character skin combos, 9 new buildings, 4 new building skins, 22 new decorations and 1 new decoration skin. It is based on the Season 23 episode, At Long Last Leave and the Season 24 episode, Homer Goes to Prep School.

January 23 Update (4.31.0; "v4_31_Homergeddon")

 * The app icon, the splash screen and the friend visit's icon were changed to new ones for the event.
 * The whole game was changed back to the normal theme.
 * Snow was removed.
 * A new music has been added in the background.
 * The town center was set to the Mega Playscape.
 * Event Daily Challenges were added.
 * The decorations limit was increased to 10.700.
 * iPhone X's size is now the same as iPad, plus the HUD icons have been moved so they are not interferred by the space cut by the speaker position.
 * In Obectification May Be Closed Than It Appears Pt. 4, "Make Femme Fatale Prepare a Trap for Lindsay Naegle" was changed to "Make Femme Fatale Prepare a Trap for Lindsey Naegle". The job's name was changed too.
 * Two new rows of land were added but some bug with Free Land Tokens has been added, however only buyable with Free Land Tokens. Free Land Token was removed from the inventory screen and are just applied directly when usable. If old land is selected to buy, a counter for them and cash has been added.
 * Battle Dome's task name was changed for the event from "Training Hungry Children" to "Scavenging After Recent Battle" and now rewards 5 Scraps every 4 hours.
 * A new description to unlock Milhouse was added: "Reach Level 8".
 * A new description to unlock Springfield Penitentiary and Snake was added: "Start the "Crime Doesn't Pay Unless You Make It" quest".
 * Large and in Charge Pt. 1 now requires Dia Betty to be in inventory or unlocked, instead of just unlocked.
 * The water disappearing from bottom rows bug was solved.
 * The Mansion Gardens bundle in the Road to Riches now come together as one once unlocked and placable.
 * Van Houten House now requires Level 5 instead of Level 8 and Trillhouse Pt. 1 started for the duration of the event.
 * Springfield Penitentiary now requires MyPad to be completed.
 * Phineas Q. Butterfats, Swanky Fish, Madame Chao's, Up Up and Buffet, Power's House, Der Krazy Kraut and Howard's Flowers are now buildable from inventory.
 * A new character group, Moe's Regulars, was added: Homer, Barney, Lenny, Carl, Larry and Sam.
 * Hans Moleman's speech bubble position was changed.
 * Springfield Opry House and Ye Olde Off-Ramp Inn now have exciting text in the store: "Generaes Ribbons!".
 * A new decorations group has been added, "Stop Sign Group" with just the Stop Sign.
 * Erik, Peta, Pita, Jeremy Jailbird and Wendell Borton can now Bounce at the Moonbounce.
 * Jessica Lovejoy's Disgrace a Local Landmark now sets the Jebediah Statue back to normal if destroyed during the event, before disgracing it.
 * Lindsey Neagle naming errors were corrected.
 * Police Tank Pt. 2 quest now says "Build the Kwik-E-Mart" instead of "Reach Level 19 and Build Springfield Penitentiary".
 * Monkey Bars now require Level 6 to be visible in store instead of 31, and Level 9 and We Do Need Yes Education Pt. 2 to be started to be buyable.
 * Hellfish Monument's Rommelwood Academy event icon was raised.
 * Sgt. Skinner Tank Bundle now has visibility requirement of Sgt. Skinner and WWII Tank not being bought.
 * Hellfish Bundle now has visibility requirement of the bundle not being bought previously.
 * Completing A Beautiful Mind Pt. 3 and Forgetful Hellfish Pt. 3 now yields and  instead of  and.
 * Forgetful Hellfish Pt. 1 now requires Hellfish Abe to be unlocked.
 * Valentine's Cooling Towers don't require Control Building anymore. In case it's not built yet, it'll be placed in inventory.
 * Outlaw Snake's Play with Jeremy now uses Jeremy Jailbird if unlocked.
 * Sponsored Church is no longer showing in the store if the skin is bought.
 * Krusty's Kristmas on Ice is now storable.
 * STEM Conference Hotel's build time is now 6 seconds.
 * Mayan Bundles now autoconsumes upon buy.
 * To try and fix them previously not being awarded, Clawing Zombie and Snarling Zombie seem to have disappeared for some users and ea forum mods reported it being a bug being fixed.
 * Homerpalooza Stages, Tailgate, Artic Hypertrain, Bully-vern's Cave, Rigellian Christmas Fireplace and Rigellian Christmas Spaceship, if placed facing the water, have characters and NPCs placed wrong or animations working incorrectly.

January 25 Update ("v4_31_Homergeddon_Patch1")

 * Mountain Man and Ice Bishop of Baverly Hills can now Fortify Mega Playscape.
 * Jeremy Jailbird, Pita and Peta can now Assault Mega Playscape.
 * Pita and Peta can now Assault Junk Base.
 * Barney's Drink at Moe's Express no longer rewards Event Currency.
 * Clawing Zombie and Snarling Zombie are now added back if disappeared.
 * Outlands Gate's Prize cost was fixed (previously costing the same amount as Bare Bronze).

February 2 Update ("v4_31_Homergeddon_Patch2")

 * A new bundle name, Ruffians Bundle, was added.
 * Dragon's Teeth now has 0.25% Bonus $ and XP.
 * Moe's Express now has 4.5% Bonus $ and XP.
 * Slaghold's task resetting on going to KrustyLand or friend town was fixed.