The Sims 3 collection pack is also one of the most unique and all-in-one packs, making it worth buying. In addition, this is a holiday sale published by “steam” in which you will be able to buy expansion packs for Sims 3 and save up on a lot of money. This is a great sale as getting cheap stuff in The Sims is rare. You can buy the entire Sims 3 collection pack for only 67 dollars. If you want to get the Sims 3 collection, you will need at least one of the following: Island Paradise, Movie Stuff Into the Future, Generations, Diesel Stuff, Supernatural, Seasons, the ’70s, 80’s & 90’s Stuff, University Life, Town Life Stuff, Pets, Master Suite, Showtime, Katy Perry’s Sweet Treats Stuff.If you want to update the game, you need the original files so that you can update without getting an “Invalid File” error.