This is a paid asset, but now you can download 100 Pixelated Backgrounds for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
100 Pixelated Backgrounds v1.0
Make awesome designs that will not only catch the eye of everyone but that will allow you to work with your imagination to built something playful and cool.
Use them for brand work, print design and many more. Bring an authentic vibe to your graphics.
Huge library of realistic HD Backgrounds;
High resolution ready to print 300DPI;
Extended license – create and use as many of these fonts as you’d like on your own personal projects as well as any commercial ones for clients.