I used the tutorial in chapter three of "Down & Dirty Tricks for Designers Vol.2" to create this image "Inspired by the Gaming World." 

 

I found the image on pixabay at: https://pixabay.com/en/headphones-portrait-face-music-man-890881/

 

I first gave it a surface blur, then I gave it a speckled grain texture and posturized the edges. Afterwards, I adjusted the posterization and further tweaked the image until it was exactly how I wanted it. I hope you enjoy!