Yes, Shadowplay is definitely a goth artist because most of their albums belong to the Second Wave of Gothic Rock, Minimal Coldwave, and Atmospheric Coldwave genres, which are among the core subgenres of goth music. Albums like Another Autumn Day, An Ideal World, and Tears are examples of their goth sound.
Shadowplay is located in Germany, Schleswig-Holstein, Rendsburg, active in 1988 — present. You can find more information about Shadowplay on their GothDB band page.
Want to check if another band is goth? Search other bands.