Re: How to download digital In store bought sims onto steam
@KeiraC8551 Sims 4 works entirely differently than Sims 3. I thought since you posted in the Sims 3 section, the 4 in your post was a typo, but perhaps not.
For Sims 4, you can in fact play through Steam with all your Origin-owned content. And you can register disc copies in Origin: they'll work like packs you buy directly through Origin. What you'd do is install the base game through Steam, then any packs you own through Steam, then any packs you own through Origin. You'd launch the game through Steam, and Origin would run in the background.