A full WUP installable package includes:

The "WUP" format consists of encrypted files (.app, .h3, .tik, and .tmd) that the Wii U can natively install to its home menu using .

Because Black Ops 2 is roughly 18–19GB , installing it to the internal 32GB NAND is not recommended. It is best to use an external USB hard drive with its own power supply. How to Prepare Call of Duty: Black Ops 2 for Installation