Re: Lost Sims 4 Disc and Activation Code

@ThatNerdyNewt  I honestly don't know how things worked back in 2014, when the game came out.  Now, one of the requirements is an internet connection to authenticate ownership, and I always thought that was true of even the first discs.

At any rate, if you download the game from your Origin account to your sister's computer, she'll need to login to your Origin account to play.  While she can probably sign into Origin in offfline mode for a while, eventually she'll likely need to go back online to reauthenticate the account.  The disc has nothing to do with this, and it's not necessary to use a disc for any game downloaded directly through Origin, whether the game is launched with the computer online or not.