Everything is easy to understand
Building related (resources, training, researching)
Battle rules related (sequence of actions, using skills, etc.)
Hero related (getting heroes, skills, upgrading them, etc.)
Alliance related (Alliance Tech, Boss, Helping)
Outside world related (gathering, raiding players)
Team Raiding related (gathering treasures and raiding treasures)
Item related (getting items, Smelting, Enhancing)
Others (Fame, Nobility, Achievements, Talents, etc.)