Epic films are, in general, large-scale dramatic productions that contain adventures, normally set in times of war and conflict. The name is derived from the great stories and characters of the epic novel and originally the classic epic poem.
Topics are subgenres
and/or themes of any kind (i.e.: Romantic Comedy, Friendship, World War II, Sports, and so on.) that enable you to define more specifically
the plot of the movie you are looking for. Topics are not keywords: If you search for a given topic, 'Sharks' for example, only movies in which sharks play a significant roll will appear, such as 'Jaws', not every movie that has a shark in it.
We already have more than 300 topics at Filmaffinity.