Etrian Odyssey (video game)

Etrian Odyssey is a 3D dungeon crawler role-playing video game by Atlus for the Nintendo DS. It centers around first-person exploration of a mysterious dungeon known as the Yggdrasil Labyrinth using a player-created party of characters. The game received mixed to positive reviews from critics, who criticized its punishing difficulty as limiting its appeal, but also making its gameplay more rewarding.
Plot.
The game starts with the player forming an adventuring guild in order to explore the mysterious Yggdrasil Labyrinth from the nearby town of Etria. This is encouraged by the Radha and its chieftain, Visil, due to the town's prosperity stemming from exploration of the labyrinth. He uses the experienced ronin Ren and the hexer Tlachtga to teach the player how to explore the labyrinth and continue descending into each stratum.
Once the player nears the lowest stratum of the labyrinth, they encounter a humanoid race known as the Forest Folk. The Forest Folk attempt to prevent the player from descending further, citing an ancient pact, but the player finally prevails against their massive guardian bird, the Iwaopeln. Entering the lowest stratum, they discover the ruins of a post-apocalyptic Shinjuku, Japan, revealing for the first time that the setting of the game is actually a far-future Earth.
At this point, the player is confronted by Ren and Tlachtga, but this time to kill the player, claiming that if they are able to discover the secrets of the labyrinth, explorers would stop coming to Etria and the town would no longer prosper. The player defeats the two, and confronts Visil deeper in the labyrinth. Visil, who was actually the immortal lead researcher who created the Yggdrasil Project to restore the planet, merges with the core of Yggdrasil, becoming the Etreant in order to protect Yggdrasil. The player defeats him, destroying Yggdrasil.
Gameplay.
Drawing comparisons to titles such as "Wizardry" and "The Bard's Tale", "Etrian Odyssey" challenges players with exploring and mapping a vast dungeon. Players navigate through the dungeon in fixed increments. Time passes only when an action is taken, causing movement, random encounters, and combat to all be entirely turn-based. The game uses a first-person view to present the dungeon using a combination of relatively simple 3D computer graphics for environments and single-frame 2D sprites for enemies.
"Etrian Odyssey" requires that players maintain their own map by annotating (with the stylus) a small map displayed on the DS's touchscreen. The player is free to map accurately or haphazardly. However, the player cannot draw their own symbols, and must instead use the game's limited set of pre-designed symbols. The game also limits the number of symbols that can be used for each level map.
In addition to normal random encounters, the player must overcome "FOEs" (Field On Enemies), which are exceptionally powerful monsters which wander around the dungeon in much the same way as the player's party, advancing whenever the player does. The AI of FOEs varies, but most will wander the dungeon in a set circular path until they sense the player's party, after which they will move directly towards the party. If the player encounters an FOE in an area with multiple FOEs, it is possible for a second or even third FOE to join the battle if it reaches the party before they defeat the first one.
Like most early RPGs, "Etrian Odyssey" uses custom characters from a number of different character classes. While only five characters can be in the party at a single time, a much larger number can be created and kept in waiting back at the "guild hall". Characters can be switched in and out of the party when in town, so if a given specialty is needed for a specific obstacle, the party can be tailored appropriately. The player allocates skill points to specific skills during level advancement.
Development.
The title was first announced by Atlus through "Famitsu" after demonstrating it behind closed doors at E3 2006.
The development team within Atlus was led by Kazuya Niinou who also directed the development of Atlus' first in-house game for the DS, "". The game features character designs by Yuji Himukai, monster design by Shin Nagasawa, a story by Shigeo Komori, and FM-like music by Yuzo Koshiro.
The game was originally to be released internationally as "Yggdrasil Labyrinth", but was renamed to avoid any possible confusion with "" (a game published in North America by Atlus a year earlier) or "Deep Labyrinth".
Reception.
"Etrian Odyssey" sold 32,511 copies in its first week of release in Japan. 
Media Create/Famitsū reported that "Etrian Odyssey" had sold 119,584 copies in Japan as of July 1, 2007. Atlus' own July 2007 investors report listed US sales of the title at around 30,000 units, roughly 2 months after release.
Elsewhere, the game received "favorable" reviews according to video game review aggregator Metacritic. Although the title was recognized as accomplishing its goals (in terms of presenting a very classic RPG experience), it was noted that this greatly limits its appeal to a certain "hardcore" demographic. The "IGN" review noted, "[...] if you gave this game to ten players you may find one or two in the group that truly enjoy it". "GamePro" concurred, remarking: "Ultimately, this one is for fans of the genre and not for the short-on-time".
Most reviews noted that those who enjoy rigorous dungeon crawls or fondly recall similar titles from years past may greatly enjoy the game. 1UP.com summarized this sentiment by concluding ""Etrian Odyssey" will definitely appeal more to the OCD'd than the ADD'd, and its punishing difficulty and very deliberate pacing may turn off younger gamers who grew up on flashier roleplayers. But it offers a real sense of wonder and a sense of accomplishment -- feelings missing from far too many modern games". N-Europe awarded the game an 8/10 score, though the site criticised its lack of story and the fact that it is "too old school for some".