Omega Ruins

The Omega Ruins are where you will find some of the most difficult fiends to fight in the game, including Great Malboros and Tonberries. Make sure you prepare yourself by equipping at least one of your characters with armor that can prevent or ward Petrification (either the Stone Ward or Stoneproof auto-ability).

You should also make sure that you have a weapon with the First Strike auto-ability. Check out the page below for more information on how to obtain it, and the helpful hint that follows for how to survive a Great Malboro ambush:

Getting There

You can find the Omega Ruins by unlocking them from the airship (along with several other locations). Check out the Airship Passwords and Hidden Coordinates guide in the Side Quests section for a list of all the secret locations:

Exploring the Ruins

Note that, similar to the Sea of Sorrow, you have to walk through the Omega Ruins to fill in the mini-map (similar to a fog of war). The map of the ruins is below:

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Legend

1	Treasure chest cluster (items from the list below, or a Mimic)
2	Treasure chest cluster (items from the list below, or a Mimic)
3	Treasure chest cluster (items from the list below, or a Mimic)
4	Teleport Sphere
5	Treasure chest cluster (items from the list below, or a Mimic)
6	Al Bhed Primer (Vol. XXVI)
	Glyph

Treasure Chests and Mimics

There are twelve treasure chests hidden throughout the Omega Ruins, grouped into the four clusters shown on the map above (one group of four chests, two groups of three, and one group of two). These chests do not work like normal treasure chests, so it helps to understand the rules before you start opening them:

The rewards come in a fixed order. The list below is not tied to specific chests. Whichever chest you open next simply gives you the next item on the list, regardless of which cluster it belongs to.

Every chest is a gamble. Each time you open one, it either contains the next treasure in the sequence or reveals a Mimic, which forces you into battle. When a Mimic appears, the remaining unopened chests in that group vanish.

The chests do not come back. Vanished chests are gone for good, and they will not return if you leave and re-enter the ruins, meaning that you only get one shot at this mini-game per save file. Two more quirks to be aware of: always finish a group completely before moving on (walking away from a group with chests still unopened causes the rest of that group to disappear), and do not rely on mid-run saves (reloading a save made after opening any chest resets the reward sequence back to the beginning without restoring a single chest).

1) Lv. 4 Key Sphere
2) Defending Bracer
3) Turnover
4) Lv. 3 Key Sphere (x2)
5) Defending Armlet
6) Friend Sphere (x2)
7) Lv. 4 Key Sphere
8) Phantom Ring
9) Cactuar Wizard
10) Warmonger
11) Teleport Sphere (x2)
12) Warp Sphere x99

Getting the 99 Warp Spheres: The final treasure only appears if you open all twelve chests in a single run without ever revealing a Mimic. Whether a chest holds treasure or a Mimic is pure luck (a clean run has roughly a 1-in-240 chance), so the trick is to touch the Save Sphere near the entrance and save your game before opening anything. Work through the chests one group at a time, and the moment a Mimic appears, reload your save and start over. Since no chests had been opened when you saved, reloading restores all twelve of them. Repeat until you manage a clean run.

It could be argued that the Warp Spheres are not worth the effort required to get them, but with the save-and-reload method it only costs time, so you will have to decide how much of it you would like to invest in acquiring these rare items.

Activating the Glyphs

Travel to the Glyph that is furthest north on the map above, picking up the Al Bhed Primer (Vol. XXVI) from the ground along the way (it lies near one of the treasure chest clusters). Touch the Glyph when you reach it, and then head back and touch the southernmost Glyph as well. This causes the platform to the south to rise.

More platforms will rise as you work your way through the area. This is also a good time to grab the Teleport Sphere treasure chest (marked as spot 4 on the map above) if you have not picked it up already.

Boss Battle: Ultima Weapon

When you are ready to move on, head for the upper right area of the map (marked by the red arrow ) to reach the elevator that leads to the next level of the dungeon. Armor with the No Encounters ability makes the trek much less painful.

As soon as you enter the small room, you will be thrown into battle against Ultima Weapon.

Boss Battle: Omega Weapon

Take the platform/elevator up to the next level to continue.

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Legend

1	Friend Sphere
2	Magic Sphere

There are two pathways that you can take. The path to the left leads to a Friend Sphere after two encounters, and the pathway to the right leads to Omega Weapon (and a Magic Sphere). You will be thrown into a fight automatically regardless of whether you have the No Encounters ability equipped each time you enter a new platform.

As mentioned above, the most difficult fights on the way up are against Great Malboros, which always ambush you and open with “Bad Breath.” Make sure that you are prepared for this by having a weapon with the First Strike auto-ability.

Save up your Overdrives for the upcoming boss battle. You will be thrust into battle once you enter the glowing area at the end of the pathway.

The game automatically warps you back to the entrance of the Omega Ruins as this dungeon is now complete.