Parents need to know that Stranger Things: Puzzle Tales is a Match-3 game for iOS and Android devices. The game features some violence -- players try to attack and defeat out-of-this-world creatures, who strike back and can knock characters out of the game. But the battles aren't bloody or too intense, and while monsters slump over, nobody is explicitly shown as dying. Instructions are given through character conversations and in separate windows that pop up. Most are clearly written and easy to digest, although some aspects of the gameplay, such as why a seemingly random number of points like 273 is shown when an enemy is struck, can be unclear. Packages of diamonds are sold in the app's store for $4.99 to $99.99, but purchases aren't required to play the game.