Treasure of the Rudras

The game features a magic system where the player can create magic spells by entering words up to six katakana characters.[2] Whereas most console RPGs give the player access to a limited number of precreated spells, it allows the player nearly total creative freedom.[1] The player can enter various magic words (called kotodama (言霊,ことだま) in the original) into their grimoire. Every one will have some effect, although most are not useful. There is an underlying framework to the system, however, which is based on the gameworld's elements.

A complete mantra generally consists of a prefix, elemental core, and suffix, although the core alone is enough to produce an effect. There are eight elements (plus healing), and of these, six are arranged in mutually antagonistic pairings: fire vs. water, wind vs. electricity, and light vs dark. The remaining two offensive elements, earth and void, have no strengths or weaknesses. Since spells are formed from letters, there are specific patterns corresponding to each element. Certain spells that use the root word tou for example, will produce lightning-based attacks, while those containing aqu will create water-based effects.

Additionally, there are prefixes and suffixes that can be added onto the base elements to change their attributes. Most of these influence the base power and cost to use the spell, but others add abnormal status effects (for example, poisoning the target) or change the mantra's range so that it only targets a single enemy instead of multiple ones or vice versa. Prefixes and suffixes with similar effects can be used in tandem to produce amplified effects.

Other mantras consist of unique words, many of them in English, that create certain effects and skip the naming system entirely. Many of these strange words are learned from in-game characters or by reading books. For example, geo is an earth-related mantra, and kingcoast is a water spell. Adding prefixes or suffixes to these usually makes something completely different (and often useless). This use of spelled-out mantras allows the player to learn magic from even their enemies. When an enemy uses magic, the player has but to write down the spells used and then to enter them into his or her own grimoire after the battle in order to have access to them. Some of these enemy spells are extremely powerful, although many are not as cost-efficient as the basic spells described above. Some are more space-efficient versions of regular spells.

The story is divided into three major scenarios, each with a different main character: the soldier Sion, the priestess Riza, and the archaeologist Surlent.[1] As the player enters new areas and accomplishes different tasks, the human race's final 15 days slowly ebb away in a predetermined day/night cycle. The player is free to play the scenarios in any order, and may even leave one storyline to follow that of another character for a time.[1] The actions of the characters in one location and time may have an effect on the others, as well, both in the general story and in gameplay. For example, if one group of characters leaves a sacred relic somewhere, another character may come and find it on a later day in their own part of the game. After successfully completing all three scenarios, players must take on a fourth, featuring the roving thief Dune and the heroes from the previous three chapters in their final confrontation with the game's major villains.

Before the events of the game, the Majestic Four created the world, the most powerful of them being Mitra who was also the creator of the Earth and the Moon. They then gave life to an entity known as a Rudra with power from the Guardian of Evolution, Gomorrah, who uses his Eternal Engine to facilitate new beings.

Every 4,000 years, a Rudra appears with a race of its own and the race that came before it is destroyed or driven to near extinction. Former Rudras have since become fossils that archaeologists refer to as Lago Stones. During the Great Cycle, the Danans were succeeded by the Merfolk, the Reptiles, the Giants and finally by the Humans.[1]

At the start of the game, fifteen days remain before the coming of a new Rudra and the end of humanity begins.[1] The characters Sion, Surlent, Riza and Dune each come into possession of a Jade, a treasure discovered in the Lago Stones. It is later revealed that Gomorrah requires the Jades in addition to other treasures to create a perfect Rudra, and that a weapon known as Sodom destroys every successive race from its lair on the Moon.

After both Gomorrah and Sodom have been thwarted by the Jadebearers, they unite and board a Danan flying vessel known as the Ark to travel to the Moon and confront Mitra. Upon defeating her, Mitra praises the Jadebearers for their strength and reveals that long ago the Majestic Four once fought a force known as the Destroyers who were a threat to the world. When the Majestic Four won, Mitra knew the Destroyers would one day return and resolved to defeat them by creating a perfect race through evolution while using the 4,000 year cycle to replace weak races with stronger ones. In an instant, Mitra passes on her knowledge of the Eternal Engine to Dune and also leaves the task of fighting the Destroyers to the human race.

During the ending, the party return home and experience a vision of a world brought to ruin by the Destroyers, which Dune interprets as a warning from Mitra. He considers using the Eternal Engine to evolve humanity, but the Jadebearers decide against it so they do not repeat Mitra's actions, and instead choose to let the human race evolve naturally.