Open Wallpaper Engine, then select the option "Wallpaper Editor" - You can also open the editor by right-clicking the icon in the taskbar and choosing "Create Wallpaper".
The editor will appear and click on "Use a Template".
Then select the option "2D Scene" & enter a project name.
Clicking "Ok" will load the 2-D project and the achievement will unlock!
Credit:
https://steamcommunity.com/sharedfiles/filedetails/?id=26427...