Re: origin never opened again, the new EA app has taken away multiple expansions
@Liketoplaygames Does your computer run Windows or macOS? The 64-bit Mac version of Sims 3 requires a different set of "entitlements," as they're called, and sometimes these entitlements don't get applied. The one for the Katy Perry pack can't be added anymore because of licensing issues, but the other expansion and stuff packs should be fine.
Monte Vista is a Store world and is handled differently. Please see the first post of this thread:
https://answers.ea.com/t5/Store-Issues/Sims-3-Store-world-can-t-register-install/m-p/12619800
For the rest, please list the packs that aren't available.
There's no way to play the EA App version of Sims 3 without at least a temporary internet connection. You'd need discs, and a Windows PC (or a very old Mac), and the base game disc would need to have been manufactured prior to September 2012.