世界樹の迷宮
Character classes that were brought in from the two series had to be carefully considered in order to maintain game balance and to avoid overlap with other classes; for instance, the Gunner class was chosen to be the "ranged attacker" class of the game rather than the similar Survivalist class—a class introduced in the first "Etrian Odyssey" game—as the Survivalists in addition to their ranged attacks have several skills that assist with dungeon exploration, and thus would overlap with the abilities of the Wanderer class - a class based on the player character in the "Mystery Dungeon: Shiren the Wanderer" series. Another class that was considered for the "ranged attacker" role was the Arbalist—a class from "Etrian Odyssey III: The Drowned City"—but due to its high damage output it would have been very difficult to balance the game had it been included. Another factor in choosing the Gunner was that it already was a popular class in the "Etrian Odyssey" series, and had been made into figurines in Japan.