The “forever save” idea is inspiring a lot of gorgeous prep work – renovated worlds, curated Sims, perfect lore – but Gloria from Yellow Llama Co. argues that many of us get stuck in perfectionism and never hit Play. Her fix is simple and practical: give your forever save a measurable gameplay goal, lock in a few key settings, and celebrate progress with rituals that keep you engaged for the long run.

Below is a condensed guide drawn from her video.

Step 1 – reframe “forever” into a playable goal

  • Intention is not enough. Pick a quantifiable target so you have a reason to play.
  • Gloria’s recommendation: a Century Save – play 100 Sim years in a single save line.
  • Why years Not EA App hours. Sim years measure actual live gameplay, not time paused in CAS or Build.

Step 2 – lock the core settings

  • Lifespan: Normal (about 132 Sim days for a full lifetime). This lets lives move forward without feeling rushed.
  • Aging: On for everyone – active, inactive, and unplayed households. This keeps peers in the same age band and preserves realism.
  • Seasons length: choose 14-day seasons
    • 7-day seasons – too short for holidays and arcs
    • 28-day seasons – too long for a Normal lifespan
    • At 14 days, 1 Sim year equals 56 Sim days – plenty of time for events and calendar traditions

Step 3 – estimate your real time investment

  • In The Sims 4, 1 Sim day at normal speed is about 36 real minutes.
  • With sleep, work fast forward, pausing, loading screens, and decision time, Gloria estimates ~20 real minutes per Sim day on average.
  • That makes 1 Sim year ~18.6 real hours with 14-day seasons.
  • A Century Save is roughly 1,860 hours. Do not let that big number paralyze you – play one year at a time.

Step 4 – celebrate every Sim year

Create an annual ritual so your progress is visible and fun.

  • Add a calendar holiday – Gloria calls it Watcher Day – set traditions like Tell Stories, Grand Meal, Fireworks, Party Spirit.
  • Capture memorabilia each year – a portrait, a park photo to show growth, a family award wall.
  • Outside the game, make a “Year in Review” – a mock newspaper or screenshot collage.
  • Host a tiny Awards Night – Best Screenshot, Biggest Scandal, Greatest Love Story, Sim of the Year.

Step 5 – break 100 years into eras

Milestones keep you motivated. Gloria suggests five:

  • Bronze – 10 years
  • Silver – 25 years
  • Gold – 50 years
  • Diamond – 75 years
  • Platinum – 100+ years

Mark each era with a big change. Three ideas:

  1. New time period per era – Contemporary → Cyberpunk → Dystopian → Medieval → Renaissance. Reskin builds, fashion, laws, and social rules.
  2. Grow the universe – Bronze plays in 1 world, Silver in 2, Gold in 4, Diamond in 8, Platinum in more. Rotate, add rules for who can live where, or retire worlds to fit your lore.
  3. Introduce immortals or occults – Add one lasting “guardian” per era, or roll in vampires, werewolves, spellcasters, fairies, mermaids as eras advance. Tie them to your mythos and let them thread your history.

Step 6 – accept the two elephants in the room

  • Save corruption happens – Your “forever” might span multiple files. When needed, port your families and lore into a fresh shell. The story continues – the file name is not the story.
  • The game does not track years – You must track time outside the game. Use a paper tally, a spreadsheet, or a Notion setup. Gloria shows two Notion-based methods and uses her Sim Guardian pages to log years, households, memories, and rotation plans.

Step 7 – play forward

  • Press Play more, pause less. Gloria calls this forward living – let events unfold, adapt your story, and resist restarting when plans change.
  • Your forever save will never be perfect. It will be lived in – which is the point.

Quick start checklist

  • Set Normal lifespan, Aging On for everyone, 14-day seasons
  • Set a Century Save goal and add Watcher Day to the calendar
  • Create a simple year tally outside the game
  • Pick your era milestones and the big change you will unlock each time
  • Start Year 1 with a short to-do: one family dinner, one community outing, one screenshot you love

Source: https://www.youtube.com/watch?v=dSctOf9zEJs&ab_channel=YellowLlamaCo.byGloria

FAQ – The Sims 4 Forever Save and Century Save

What is a forever save?
A forever save is a single Sims 4 save file you commit to long-term instead of constantly restarting. The idea is to grow legacies, lore, and memories over years of play.

What is a century save?
A century save is Gloria’s suggested goal: play 100 Sim years in one save line. It gives “forever” a measurable target and keeps you focused on gameplay instead of endless prep.

How long is one Sim year?
With 14-day Seasons, one Sim year = 56 Sim days.

How long does it take in real time to play one Sim year?
Roughly 18–20 hours, assuming ~20 minutes per Sim day with pauses, loading, and daily tasks.

What settings should I use for a forever save?

  • Normal lifespan (~132 Sim days per Sim’s life)
  • Aging On for all households
  • 14-day seasons for balance

What if my save file corrupts?
It happens. You can port your Sims and story into a fresh save. The “forever” part is the lore and continuity, not the actual file name.

How do I track Sim years?
The Sims 4 doesn’t track them. You’ll need to count outside the game with a paper log, spreadsheet, or a Notion template like Sim Guardian.

How do I celebrate progress?

  • Add a yearly holiday (e.g. Watcher Day)
  • Save memorabilia like screenshots or portraits
  • Create outside-the-game reviews like mock newspapers or awards

What are the milestone eras?

  • Bronze – 10 years
  • Silver – 25 years
  • Gold – 50 years
  • Diamond – 75 years
  • Platinum – 100+ years

Each milestone can introduce a big change: new time period, expanded worlds, or special immortals/occults.