Why are unknown game videos and images are getting stored in the gallery

[Android Central Question]

Though i did not download these games...why do they appear

 

[Rukbat]

They're not. Gallery is an app, not a place. It shows all pictures stored in your phone that aren't in folders specially marked to not show any photos in them. Evidently you have something that's downloading photos (a web browser, maybe) that's not marking its folder to not be shown.