After noticing that in the Sims 4 the achievement system is setup so it just keeps progress for the save file you're on, I came up with this challenge

I apologize if i'm copying anyone, I didn't see anything similar but you just can't be sure

ACHIEVEMENT RUN CHALLENGE

The goal of this challenge is to gain all the achievements in the game with a single family (excluding ones such as Legacy Leader since they requires multiple households)

~SETTING UP~

-Put the life span on either long or normal, depends on how easy/hard you want your game to be

-In CAS make a YA male or female, their attributes are completely up to you

-Place him/her down anywhere you like but remember, NO MONEY CHEATS ALLOWED!

~RULES~

-You may use cheats to reset a stuck sim or for building (like moveobjects on), but nothing else.

-No aging up sims prematurely. You can use a cake ON their birthday if you wish.

-

~ACHIEVEMENT LIST~

This excludes all bugged/inactive/uncompleteable with one family achievements (For a full list go here: http://simsvip.com/the-sims-4-achievements/)

BASE GAME

-50-Mile-High Club: Successfully WooHoo in a Rocketship.

-All Nighter: Have a Sim stay awake for 24 straight Sim hours.

-Alphabet Legacy: Play a household for 26 generations or more.

-Are You Entertained?: Have a Sim reach max level in the Entertainer career.

-Basketcase: Have a Sim get in and out of all primary emotional states within 24 Sim hours.

-Beyond Repairs: Have a Sim reach max level in the Handiness skill.

-Black Widow: Have a Sim outlive five spouses.

-Bow-dacious: Have a Sim reach max level in the Violin skill.

-Captain of Industry: Have a Sim reach the max level in the Business career.

-Cast Away: Have a Sim reach max level in the Fishing skill.

-Channel Surfer: Have a Sim listen to all radio stations and watch all TV channels.

-Code Monk: Have a Sim reach max level in the Programming skill.

-Connoisseurus Rex: Have a Sim reach max level in the Gourmet Cooking skill.

-Elementary: Have a Sim reach max level in the Logic skill.

-Event Horizon : Earn a Silver rating on every social event.

-Fired Up: Have a Sim reach max level in the Fitness skill.

-Flying Colors: Have a Sim reach max level in the Painter career.

-For the Hoard!: Complete all collections.

-Full House: Play with an eight-Sim household in The Sims 4.

-Games Within Games: Have a Sim reach max level in the Video Gaming skill.

-Ghost Family: Have a family of 8 playable Ghosts.

-Ghostly: Have a Ghost in your household.

-Green Thumb: Have a Sim reach max level in the Gardening skill.

-Harvested Interest: Harvest from 50 wild plants in The Sims 4.

-Hello, Darkness, My Old Chum: Have a Sim befriend the Grim Reaper.

-Honorary SimGuru: Play the Sims 4 for 100 hours.

-Host with the Most: Host 50 Bronze or better Social Events across all Sims.

-I'm the Mix Master: Mix 100 Drinks.

-I, Spy: Have a Sim reach max level in the Secret Agent career.

-In the Game: Play The Sims 4 for 24 hours.

-Introvert: Have a Sim do nothing social for 24 Sim hours.

-It's Not Brain Surgery: Have a Sim reach max level in the Rocket Science Skill.

-Ivory Tower: Have a Sim reach max level in the Piano skill.

-Just Getting Started: Play The Sims 4 for 5 hours.

-Knack of All Trades: Reach max level in every career in The Sims 4.

-Knock, Knock...: Visit 25 different Lots in The Sims 4.

-Legacy Player: Play a household for ten generations or more.

-Legendary Legacy: Play a household for 100 generations or more.

-Literal Genius: Have a Sim reach max level in the Writing skill.

-Mael-strum: Have a Sim reach max level in the Guitar skill.

-Mischief Mastered: Have a Sim reach max level in the Mischief skill. (Seriously it should say 'Mischief Managed' )

- My, You've Changed!: Have a Sim become both max thin and fat within a lifetime.

-Old Lace : Cause 10 NPC deaths on your home lot in The Sims 4.

-Old & Wiser: Have a Sim age up.

-On a Whim: Have a Sim complete 10 Whims at a single social event.

-Over-Achiever: Have a Sim complete 5 Aspirations. (Ulitimate Over-Achiever: Complete this challenge )

-Refined Palette: Have a Sim reach max level in the Painting skill.

-Rosebud : Gain 1,000,000 Simoleons in a single Household.

-Smooth Talker: Have a Sim reach max level in the Charisma skill.

-Speed Dating: Have a Sim “first kiss” three times at a single social event.

-Splice of Life: Unlock a new plant type through grafting.

-Startup Upstart: Have a Sim reach max level in the Tech Guru career.

-Stellar Work: Have a Sim reach max level in the Astronaut career.

-Straight for the Jocular: Have a Sim reach max level in the Comedy skill.

-Suave Criminal: Have a Sim reach max level in the Criminal career.

-Tender Loving: Have a Sim reach max level in the Mixology Skill.

-The Circle of Life: Play a Sim from birth to natural death.

-The Main Event: Earn a Gold rating on every social event.

-The Most Interesting Sim in the World: Have a Sim with 12 or more Traits.

-The Pen is Mightier: Have a Sim reach max level in the Writer career.

-Triple Play: Have a Sim give birth to triplets.

-Tungsten Chef: Have a Sim reach max level in the Cooking skill.

-Up a Notch: Have a Sim reach max level in the Culinary Career.

-Vengeful Deity: Kill off 10 of your Sims via unnatural causes.

-View to a Skill: Reach max level in every skill in The Sims 4.

-What would it be like?: WooHoo with a ghost.

-Whimsicle: Complete 100 Whims across all Sims.

-Woohoo!: WooHoo with 50 Unique Non-Player Sims.

-World Competitor: Have a Sim reach max level in the Athletic career.

HIDDEN BASE GAME

-‘Til Death Do Us Part: Have a Sim die at their own wedding.

-Aspirational: Complete every Aspiration in The Sims 4.

-Baby Boom: Have 400 babies across all your Sims.

-I’ll get around to it!: Have 10 broken objects on Sim’s lot

-No Excuse: Have a Sim’s bladder fail on a lot with 5 or more toilets.

-So… I’ll call you?: Have a Sim bladder fail while on a date.

-What Makes a Sim Turn Neutral?: Have a Sim stay in the Fine emotion for 48 straight Sim hours.

GET TO WORK (Optional)

-Aliens Among Us: Discover 10 Aliens in Disguise

-Carried Away: Have Sims be abducted by Aliens 3 times

-Double Life: Have an Alien in disguise marry a Sim without them knowing their secret

- Down To A Science: Have a Sim reach max level in the Scientist career

-Patients Are A Virtue: Have a Sim reach max level in the Doctor career

- Picture Perfect: Have a Sim reach max level in the Photography Skill

-Piece of Cake! Have a Sim reach max level in the Baking Skill

-Very Special Delivery: Have a male Sim give birth to an Alien baby

GET TO WORK HIDDEN (Optional)

-Autopsy-Turvy: Perform surgery successfully on an Alien

-Death of a Salesman: Have a Sim die while running a store

-You-Reek-A: Make a scientific breakthrough while taking a shower

OUTDOOR RETREAT (Optional)

- Critter Catcher: Collect all the insects and all the new fish in Granite Falls.

-Nature's Course: Have a Sim reach the maximum level in the Herbalism skill.

-Tastes Like Burning: Have a Sim consume every type of toxic plant.

OUTDOOR RETREAT HIDDEN (Optional)

-No Longer Solitary: Bring a hermit back to society.

GET TOGETHER (Optional)

Currently Unknown (If you know what they are, please post them below)

GET TOGETHER HIDDEN (Optional)

Currently Unknown (If you know what they are, please post them below)

SPA DAY (Optional)

Currently Unknown (If you know what they are, please post them below)

SPA DAY HIDDEN (Optional)

Currently Unknown (If you know what they are, please post them below)

DINE OUT (Optional)

Currently Unknown (If you know what they are, please post them below)

DINE OUT HIDDEN (Optional)

Currently Unknown (If you know what they are, please post them below)

Please let me know if I left any loop holes, if you know the achievements for Get Together, Spa Day, and/or Dine Out, or if I need to clarify anything. Thanks for reading!

Ooooh! I love it! I'll have to try it out for myself

Cool! I was actually thinking about starting it myself in a few minutes here :-D