Based on DreamWorks' computer animated film and Cressida Cowell's book, How to Train Your Dragon follows the adventures of a scrawny young Viking named Hiccup Horrendous Haddock III, who goes against his tribe's wishes by befriending a dragon instead of slaying it. The video game version allows you to customize your own dragon mount by choosing one of six species and adjusting its head, body type, and so forth. Two modes of play include Adventure Mode and Arena Mode. The former has you exploring the world as either Hiccup or Astrid. In the latter, you'll participate in special challenges to level up your dragon's speed, power, fire, and other attributes. You'll then engage rival dragons in aerial or ground combat, using your dragon's breath and other forms of attacks to defeat all opponents.