OTTTD is a Tower Defense type game but with a slightly deeper and mechanical characteristics of RPG type games. We can choose between 7 different hero classes into the battlefield and gain XP as we go. We also have an extensive skill tree that includes powerful magic combat. More than 30 active skills, around 40 passive skills and 30 different weapons to equip, make up the arsenal that we have. 12 types of towers to build and 6 kinds of different guns to deal with the waves of a variety of enemies.