Random Legacy Challenge: the rules

At a glance

Creator

tigger89

Length

10 generations

Packs

Base game. Extra roll results are tagged for Get to Work, Outdoor Retreat, Get Together, City Living and Dine Out; skip those if you do not own the pack.

Rules

The creator's page, read on October 28, 2026

How to start

• Start a new save in a world you have not played.
• Aging on and set to normal, including for households you are not playing.
• Roll generation 1 on tables A to F before making the founder: A marital status, B number of children, C heir career, D career for each spouse or helper, E generation goal, F fun rule.
• Create the founder (and any spouse or helpers the rolls call for) in CAS. You choose looks, traits and aspiration unless a roll forces random ones. You may not create the children.
• The heir must be at least a young adult. Move into any empty lot, built or not.

The rules

• Each new generation's rolls are made only when that generation is born, so you cannot plan ahead.
• Table A sets the household: single, couple, second partner, or extra non-romantic helpers living in.
• Table B sets the exact number of children: 1 to 5.
• Heir rolls a primary career (conventional, unconventional freelance-style, or Career Hopper); spouses and helpers roll a secondary career, which can also be unemployed.
• Sims may only earn money in the ways their rolled career allows. Family members may not feed income to each other.
• No cheats of any kind (money, skill, relationship, needs) and no exploits. Fixing a bug is allowed if you undo any gain.
• No early aging up; pregnancies must run the full time, so no pregnancy test for legacy Sims.
• Aspirations are chosen, not rolled, but cannot be swapped once chosen.
• The heir must be a child born to or adopted by the previous heir. Spares move out within 24 hours of becoming young adults.
• Spouses and helpers you create get random traits, must live elsewhere first, and must be met in town. Their money is removed when they move in.
• Only the young again potion may be bought: one use at first, a second unlocks when the generation 6 heir comes of age.
• You may re-roll a career, goal or fun rule that repeats within a generation or from the last one.
• Failing any rolled rule (child count, goal, fun rule) loses the challenge. Bugs and one-off autonomous slips are forgiven.

How you win

Complete the rolled goals of all 10 generations; the challenge ends when generation 10 is done and the generation 11 heir becomes a young adult.

Tips

• Use a random number site (random.org) or a set of tabletop dice and write every roll down per generation; you will need to look them up for decades of Sim time.
• When you roll a career that needs a rabbit-hole lot you must watch (Doctor, Detective, Scientist, Restaurant), avoid giving the same kind to two Sims at once; the rules let you re-roll that clash.
• Pick aspirations that fit the rolls: for example, Big Happy Family needs at least 3 children and Public Enemy needs the Criminal career.

Free tools for the challenge

• Sims family tree maker
• Sims 4 legacy challenge generator
• Sims 4 random trait generator
• Sims 4 name generator

More legacy challenges

• Legacy Challenge
• Not So Berry Challenge
• Decades Challenge
• Ultimate Decades Challenge
• 100 Baby Challenge
• Disney Princess Challenge
• Apocalypse Challenge
• Breed Out the Ugly Challenge

Questions