Etrian Odyssey IV: Legends of the Titan

From Game Box: For centuries, the tree Yggdrasil has been a constant presence in the lives of the people of Tharsis. But its roots are in a far-off land yet to be discovered. The ruler of Tharsis thus sponsors Explorers Guilds to uncover Yggdrasil's secrets, and you, fair adventurer, are next to seek fame, fortune, and the answer to Tharsis' oldest mystery!