Mortal Kombat 11 received numerous balance patches and content updates (Aftermath expansion, etc.). If you install the "vanilla" version offline (via disc on console), you will be playing version 1.00. This version contains significant bugs and lacks many quality-of-life features regarding gear and AI behavior.
: Even with a physical disc, most versions require significant day-one patches. For instance, the Nintendo Switch version requires a minimum download of even if you own the game card. Ultimate Edition PlayStation 4 mortal kombat 11 offline install