There are unlockable characters and obtainable cards. So far I have unlocked all characters in Yu-Gi-Oh Duel Links
I like to watch Dino Squad, Street Sharks, Sabrina's Secret Life, Extreme Dinosaurs, Sonic Underground, Transformers Prime, Power Rangers, Yugioh, Phineas and Ferb, Digimon, Cardfight Vanguard, Land Before Time (14 Films and TV Series) and I like to play Zuma Deluxe