A stable internet connection and a Battle.net account are mandatory for multiplayer . Comparison of Game Modes Internet Required Progress Saved Campaign No (after first login) Local & Cloud Versus (AI) No (after first login) Ranked Ladder Custom Maps
In the Battle.net launcher, use the "Locate Game" option (under the Cogwheel icon) to re-point the launcher to your installation folder, which can refresh the data handshake. Are you experiencing a specific error code or is the download simply stalled at 0% Preparing game data - Technical Support - SC2 Forums
Currently, StarCraft 2 loads map data, assets, and replay info at the start of a match or replay. This leads to: starcraft 2 preparing game data
Ironically, "preparing game data" is a single-core CPU intensive task. If your CPU is thermal throttling (hitting 90°C+), it will downclock to 800Mhz. Suddenly, decompressing data takes 10x longer.
, it is usually a sign that the game is performing a background update, verifying local files, or stuck due to a permissions issue. 🛠️ Common Fixes A stable internet connection and a Battle
If you are repeatedly stuck on this screen or it downloads the same data every time, try these community-verified solutions: Match Language Settings: Ensure the language selected in the Battle.net Launcher
Some players resolve "Preparing Data" stalls by switching their game region (e.g., from Europe to Americas) in the launcher, starting the game, and then switching back to their original region once the data downloads. Clear Cache Folders: Close the game and launcher, then delete the Battle.net Blizzard Entertainment folders located in %ProgramData% to force a clean data check. Avoid OneDrive Sync: StarCraft II often conflicts with OneDrive. Ensure your Documents\StarCraft II This leads to: Ironically, "preparing game data" is
Try these solutions in order. Most players stop the error at step 1 or 2.
Windows Security > Virus & threat protection > Manage settings > Exclusions > Add exclusion > Folder.
The message is not a bug—it is a symptom of a decade-old engine trying to keep pace with modern hardware and security protocols. For 90% of players, the solution is a simple cache deletion or switching to the 32-bit client. For the competitive player who needs to load into a ladder match in under 15 seconds, the answer is an SSD and a custom GPU driver profile.