The game has a Battle Mode (single-player campaign) that can be played offline. However, a persistent internet connection is required for most features, including Faction Wars, character unlocks, and saving progress to the cloud.
If you are looking to download the official Mortal Kombat Mobile (formerly known as Mortal Kombat X The game has a Battle Mode (single-player campaign)
Here is the safest method to get the latest version (Updated for 2025/2026 mechanics). including Faction Wars