QUELLEN

• Coolmathgames: Die Geschichte von Snake the Game
• Coolmathgames: Tic Tac Toe-Geschichte: Drei in Folge im Wandel der Zeit
• It's Nice That: The history of Snake: How the Nokia game defined a new era for the mobile industry
• Playspherestudios:The Evolution of Endless Runner Games: Where Does Runner Runner Fit In?
• Wikipedia: Endless Runner
• Wikipedia: Snake (Video Game)
• Wikipedia: Tic Tac Toe