There are now three ways to experience classic games from The Sims's catalogue.
With The Sims: Legacy Collection, you'll get a collection of original The Sims packs (The Sims: Livin’ Large, The Sims: House Party, The Sims: Hot Date, The Sims: Vacation, The Sims: Unleashed, The Sims: Superstar, and The Sims: Makin’ Magic) all in one, plus The Sims 4's Throwback Fit Kit! Create a neighborhood of Sims and guide their lives through careers, friendships, and romance – or create chaos with open-ended gameplay that lets you shape their destinies.
In The Sims 2: Legacy Collection, you'll get the game and a ton of packs (The Sims 2: University, The Sims 2: Nightlife, The Sims 2: Open for Business, The Sims 2: Pets, The Sims 2: Bon Voyage, The Sims 2: Seasons, The Sims 2: FreeTime, The Sims 2: Apartment Life, The Sims 2: Holiday Party Pack, The Sims 2: Family Fun Stuff, The Sims 2: Glamour Life Stuff, The Sims 2: Happy Holiday Stuff, The Sims 2: Celebration! Stuff, The Sims 2: H&M Fashion Stuff, The Sims 2: Teen Style Stuff, The Sims 2: Kitchen & Bath Interior Design Stuff, and The Sims 2: Mansion & Garden Stuff) bundled together, plus The Sims 4's Grunge Revival Kit. Decide whether to give your Sims long, successful existences or leave their lives in shambles. What do you want to do with your Sims' lives?
The Sims: 25th Birthday Bundle includes The Sims, The Sims 2, and all of the packs listed above plus two kits for The Sims 4 (Grunge Revival and Throwback Fit).
See release notes here: https://forums.ea.com/blog/the-sims-game-info-hub-en/the-sims-25th-birthday-bundle-release-notes-for-the-sims-and-the-sims-2/11848630
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https://store.steampowered.com/app/3314060/The_Sims_Legacy_Collection/
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