Here is the full list of all 10 Live Wallpaper Master achievements.
Create your first wallpaper
Submit wallpaper to the Workshop
Download 5 wallpapers from the Workshop
Update 5 of your wallpapers in the Workshop
Give 5 wallpapers a thumb up or thumb down
Create 15 wallpapers
Submit 10 wallpapers to the Workshop
Download 20 wallpapers from the Workshop
Create wallpaper with more than 10 layers of animations
Give 20 wallpapers a thumb up or thumb down