Step 1: Template and Shading
I started buy simply shading the outer edge of the hoodie to add some definition.
Step 2: Adding Images
Start buy picking out a few images. I recommend one big center piece on the front and back so the hoodie is less chaotic.
Find proper placement of each image. Resizing and erasing is what make the hoodie.
Step 3: Continuing...
putting the sleeves requires using the command T function and could take some time to look correct.
Step 4: The Back
use transform to make the images following the natural curves of the hoodie.
I also suggest adding a cool title. Mine is "Gamer" with a gun R. You could put this on the front or back.
For the hood of the hoodie, I recommend one large circular logo.
Step 5: Adding a Cool Texture!
Put behind all your images and fit it into the outline of the hoodie.
Step 6: Finishing Steps!
To make things stand out add a black stroke to it!
And you are all Done!
Step 7: Final Product
And remember this doesn't have to be about games, it can be anything from music to patterns!
Be creative and keep it simple.