Keeping in mind I've only played The Sims 4, my first purchase for it was a bundle with Parenthood, Vintage Glamour and Bowling Night. The first one to install was Bowling Night so I count that as my ...
Get to Work. It was the only one I had for a long time, and then I stopped playing, and then Cats & Dogs came out. And I've played ever since (and also caught up on all the EPs :D)