This video guide ill be linking comes from Billzumanati
If you go to 0:24
of his video and follow along you will download all 9 saves from his tag you will get ALL the achievements from this game. After downloading all 9 worlds you will start a new game, skip tutorial (Select dont ask me again), and open gallery. Hit
over to "My library" select "Basket case+", head down to bottom right to place household, replace, select yes, and then hit play. Once loaded select "Willow Creek", from there select "Streamlet Single" confirm and then play. As you've loaded in you WILL unlock the Introvert achievement and as you're fast-forwarding you will also unlock "Beyond Repairs", "The Most Interesting Sim in the World", "All Nighter", "Basketcase", "Games Within Games", and "Cast Away"!
The All Nighter achievement in The Sims 4 worth 14 pointsHave a Sim stay awake for 24 straight Sim hours. The Basketcase achievement in The Sims 4 worth 70 pointsHave a Sim get in and out of all primary emotional states within 24 Sim hours. The Cast Away achievement in The Sims 4 worth 49 pointsHave a Sim reach max level in the Fishing skill.
Full video guide:5:38
Introvert, Beyond Repairs, The Most Interesting Sim in the World, All Nighter, Basketcase, Games Within Games, and Cast Away.