A lot or a little?
Parents need to know that Craft Warriors is an iOS and Android game that combines real-time strategy with user-generated content, letting players battle others and create their own characters. There's violence as characters fight each other with melee weapons, but it's light and no character ever dies permanently (nor is any blood shown). While players do "battle" other live players, there's no chat or interaction. Similarly, while players can give a thumbs-up to another player's character creation, they can't vote it down or speak negatively about it. Otherwise, there's no inappropriate content in the game. Parents concerned about what the developer does with player data should read the company's privacy policy.