Ultimate Decades Assistant

Ultimate Decades Assistant is an unofficial companion mod for Morbid’s Ultimate Decades Challenge.

It is designed to make the challenge easier to manage directly in The Sims 4 by tracking historical time, Sim and pet historical ages, family roles, required rolls, and historical events - while leaving the actual decisions, dice rolls, and storytelling in the player’s hands.

The mod uses its own historical timeline independently from The Sims 4's normal aging system and allows players to configure the length of a historical year to better suit their play style.

Features

Historical Calendar & Settings

Ultimate Decades Assistant brings the challenge's historical timeline directly into the game.

• Choose how many Sim days represent one historical year, with a minimum of 4 days. Exactly 12 historical months are distributed across each historical year, regardless of the configured year length.
• Historical time progresses automatically as you play.
• The mod notifies you when a new historical year begins.

A dedicated Settings menu displays:

• the current historical year;
• the configured number of Sim days per historical year;
• the current historical day.

Global mod preferences are stored separately from individual save data.

Historical Sim Ages

The mod tracks historical age separately from The Sims 4's normal aging system.

• Sims can have their own individual historical age.
• Historical ages progress automatically with the calendar.
• Newborn Sims are automatically registered with an initial historical age of 0 months.
• Historical ages can be manually assigned or changed using full years and additional months.
• Sims outside the active household can retain and continue using their assigned historical age when supported by other Ultimate Decades systems.

Family Roles

Ultimate Decades Assistant includes family roles for managing the main and secondary branches of your challenge family.

• Each household can have its own Heir.
• The active Sim can be assigned as the household Heir.
• Sims can be assigned or removed as Secondary Family Members through the mailbox.
• Heirs and Secondary Family Members receive visible traits for easy identification.
• A Sim cannot be both an Heir and a Secondary Family Member at the same time.
• If a Secondary Family Member becomes the Heir, their Secondary Family Member role is removed automatically.
• Secondary Family Members continue to be tracked even when they are outside the active household.
• Newborn children are automatically registered and inherit Secondary Family status.

Supported Secondary Family notifications include marriage, pregnancy, childbirth, historical aging, and age-related reminders.

Pet Historical Aging

Historical age tracking is also available for dogs, cats, and horses.

• Puppies, kittens, and foals are automatically registered with a historical age of 0.
• Dogs, cats, and horses can have their historical age adjusted through Change Historical Age.
• Dogs and cats follow historical aging milestones based on the challenge rules.
• The mod provides notifications when pets reach the appropriate historical age or life-stage milestone.
• Pet birthdays and life-stage changes are displayed separately from Sims when appropriate.

Household Information

Quickly check the information relevant to the household you are currently playing, including:

• the current historical date;
• historical ages of household members;
• pets displayed separately from Sims for easier tracking.

Roll Reminders

Ultimate Decades Assistant keeps track of situations in which Morbid's challenge requires the player to make a roll.

Supported reminders include:

• Labor and birth rolls;
• Survival/death rolls;
• End of Life rolls;
• Secondary Family Marriage and Pregnancy rolls;
• Historical event rolls.

Roll reminders are tied to the appropriate historical life stage.

The mod tells you when a roll is required and which roll to make, but the actual dice roll and its outcome remain entirely in the player's hands.

Historical Events

Historical events are connected directly to the historical calendar and can trigger automatically when the relevant year is reached.

Depending on the event, notifications may provide:

• historical event information;
• temporary challenge restrictions;
• required actions;
• required dice rolls.

Currently supported 14th-century events include:

• The Great Famine
• Part 1 of the Hundred Years' War
• The Black Plague
• Part 2 of the Hundred Years' War
• Poll Tax
• Peasants' Revolt

Support for additional historical periods will be added progressively as the mod expands.

Save System

Historical calendar, age amd family role data are saved automatically, allowing your timeline and household setup to continue between game sessions.

The mod maintains backup data to help recover Ultimate Decades information if the main save data becomes corrupted.

Obsolete Sim records can also be cleaned automatically while records containing relevant Ultimate Decades data are preserved.

Global mod preferences are stored separately from individual save data.

Guide

For setup instructions and a more detailed explanation of how to use Ultimate Decades Assistant in-game, you can read the full guide on Patreon:

Getting Started with Ultimate Decades Assistant (Updated)

Languages

Currently supported:

• English
• Russian
• Spanish

For other game languages, the mod will automatically use English as the fallback language.

Requirements

• Lot 51 Core Library
• XML Injector Script

Make sure both Custom Content and Mods and Script Mods Allowed are enabled in the game settings.

Installation

1. Download the mod.
2. Extract the archive.
3. Place the mod files in: Documents\Electronic Arts\The Sims 4\Mods
4. Make sure the required dependencies are installed.
5. Start or restart The Sims 4.

Do not leave Ultimate Decades Assistant inside the downloaded ZIP file, and do not keep old and new versions of the mod installed at the same time.

About the Challenge

Ultimate Decades Assistant is an unofficial companion mod created for Morbid's Ultimate Decades Challenge and is not the original challenge itself. All credit for the challenge and its rules goes to its original creator(s).

You can find the original challenge and rules here: [LINK]

This project is not affiliated with or endorsed by Electronic Arts, Maxis, or The Sims.

Credits

Ultimate Decades Assistant - Created by Exio

Unofficial companion mod for Morbid’s Ultimate Decades Challenge.

Original Decades Challenge concept by ZombieCleo.