Assassin's Creed 3 Ubiorbitapi_r2_loader.dll File
Don't worry, This File Fix your "Assassin's Creed III - Ubiorbitapi_r2_loader.dll is missing from your computer" Error.
FOLLOW ALL STEP
Step 1: Download The File.
Step 2: Then Extract This RAR File.
Step 3: Copy All Files in this Folder.
Step 4: Right Click on the Assassin's Creed III Shortcut Icon and Click Open file location OR Find & Open Assassin's Creed III installation Folder.
Step 6: Then Right Click on this Folder(Assassin's Creed III) and Click Paste(then Replace the file in the destination, If it shows). and right-click on the desktop and click Refresh.
Now you can play :-)