do you wanna claim a free hidden game? if you do, refer to the steps below.
go to the help button on the upper left and click it. tap steam support and scroll down until you see a search bar. in the search bar, type "8-Bit Bayonetta" and tap the game. once it brings you to another place, look for a button that says "Its not in my library." and it will bring you to install the secret game. the game is made by Sega and its safe to download.
thanks for spending your time reading this :D