Discord Scam ? DM about a Mobile RPG game. [CH]

A Discord user received a DM from an unknown sender claiming to be a game developer offering a mobile RPG tester role. The sender directed the user to search for 'Kingdom Ascension' (iOS) and 'Throne of the Nine Realms' (Android), but the user could not find the games, suspecting they had been removed from app stores. The user questioned how the sender obtained their Discord username.