Hi Joey,
I understand that you are unable to find the blazblue calamity trigger in Windows Store.
I suggest you to follow the steps mentioned below and check if it helps.
Method 1:
****I suggest you to refer to the article mentioned below and check if it helps.
Why can't I find or install an app from the Windows Store?
http://windows.microsoft.com/en-IN/windows-8/why-find-install-app-windows-store
You can try to clear the store cache if the issue persists.
Method 2: Clear the store cache and check.
a. Press "Windows key + R".
b. Type wsreset.exe and click OK.
You can open the Windows Store and type “BLAZBLUE CALAMITY TRIGGER” in the search field and hit the “Enter” key on the keyboard.
Hope this helps. If you are facing the issue with downloading apps from Windows Store or if you face any Windows issues in future, let us know and we would be glad to assist you