Select and ensure both Text Language and Spoken Language match your desired language (e.g., both set to English).
Replay files contain:
Completely close the Battle.net launcher. Check your Windows System Tray (bottom right corner) to ensure it is fully shut down.
Here is a full write-up on what this phase entails, why it happens, and how to optimize it for a smoother experience. starcraft 2 preparing game data
You launch the game. The bar appears, but never moves from 0%. After 10 minutes, nothing changes. Cause: Usually a permissions error. The game cannot write its cache to your Documents folder or ProgramData folder. Fix: Run Battle.net as Administrator. Right-click the Battle.net launcher > Properties > Compatibility > Run this program as an administrator.
If the handshake reveals that two players have different data table hashes (e.g., one has a modified enUS.SC2Data with custom balance changes), the server will not start the game. This is rare but happens in arcade/custom games.
The community has developed a robust ecosystem of libraries to handle this complexity across various programming languages: Select and ensure both Text Language and Spoken
Once raw data is extracted, the "preparation" phase begins. This converts raw events into features suitable for AI models.
If you need an immediate fix to play right away, you can bypass the launcher entirely. This forces your PC to execute the client directly, completely dodging the broken validation script.
The duration of this process varies wildly from user to user. Here is why: Here is a full write-up on what this
Core game files were improperly written during a recent update or unexpected shutdown. Step-by-Step Solutions
If the "Preparing Game Data" screen is moving but very slow, the best advice from Technical Support is often to simply let it finish once without interruption, as it may be rebuilding a corrupted index that cannot be skipped. "Preparing game data" when I try launching my game
The bar gets to 50-70%, then the game crashes to desktop with no error message. Cause: Your C: drive (or the drive hosting your Windows temp folder) is full. The shader cache requires 2-5GB of free space. Fix: Run Disk Cleanup (cleanmgr.exe) and delete temporary files. Ensure at least 10GB free on your OS drive.