Erratasphere

Mission 29 - Betrayal
In-game BGM: Mind Flow
Correct BGM: The Execution
Direct Audio shows the track "The Execution" as M29's BGM and is grouped with other BGM featured in the game itself, and very clearly not with the unused tracks. However this track isn't heard anywhere in the original version of AC3.
The international version has this track in the renamed "Swarm" mission. Being the first version I played, my bias is towards this track being more fitting, with the DA's documentation only proving how it really is the right track.

A minor screw up, and one easily circumvented with a little emulator tweaking.

Before the Awakening there is Mission 00

Not content with a packed OST release, several guide books, models and figures, Namco decided to go one step further into merchandise land.

The result was a tape named "Mission 00". The title may be misleading at first, as it's not about a mission that takes place before the game proper begins. It's also not an anime prologue, but considering the "quality" of many game-related OVAs, we're better off that way!

Scrapped Weapons

Here are two pictures, one from the international opening and one from the game itself.

Courtesy of resident AC3 scholar (;D) Fabian.

6/25/2023: Thanks to the european presskit and its higher-res screencaps, I've ID'd the last two remaining weapons. They are the "Heavy Missile" and the "Long-range Missile" Unlike for the "Homing Laser", there's no trace of them in the game files.

 

...and the digging comes to an end.

Mission ID 13

Name Above The Thumbnail: (Garbled Graphics)
Save Game Screen Name: ----
Before Starting Mission Name: GAME SHOW
Background Music: None
Selectable Aircraft: Su-43 Berkut


Screenshot 1 : Mission Thumbnail
(May vary, I could not find an explanation to this)
Screenshot 2 : When you start the mission, there's an
F-16XA flying in front of you, It is the only primary target in the mission...
Screenshot 3 : ...But if you destroy it the mission doesn't end.
Screenshot 4 : There's also two R-101 flying near the F-16.
Screenshot 5 : Do you see that white line in the map??
Screenshot 6 : They're the legendary floating gun turrets!
Screenshot 7 : Another view of the guns
Screenshot 8 : And Another view of the guns.
Screenshot 9 : Your allies trying to destroy an R-201 in the Southeast corner of the map.
Screenshot 10: At 4:00 this message appears, hurrying you to do something
Screenshot 11: Smoke on the Water!
Screenshot 12: And finally at 5:00, the mission ends (fails).
Screenshot 13: If you save the game from the options menu, and then, you return to the title screen and select "Download", you'll see this.

If you load from that file, you'll start directly
in the mission.

Strange Arrow in "A Canopy of Stars"

Different Font

(EDIT August 8th, 2010) Forgot to add credits to contributor Fabian, who as it turns out found even more hidden files.

Digging Further

Ouroboros' Flyable Airplanes

Garbled stuff in the NW corner

Electrosphere - Part 2 (Unused Thumbnail)

Thanks to: Fabian for digging this stuff up and the screenshots.

Relic of Development - Work In Progress XR-900

Here is a visual comparison of the prototype, WIP model of the Geopelia (left) and the in-game, final model (right).

Differences

• Bottom engines are blue.
  
• It has a more conventional jet sound as opposed to the XR-900.
  
• The flames that come out of the upper engines are freaking big.
  
• Lack of any details in the bottom of the plane (just plain gray)
• The rest of the grey-colored part of the plane also displays a distinct lack of detail.
  
• The Prototype has flames, the final model has Aeon particles.
  
• Top speed: 2856 km/h
  
• Missile payload: 199
  

Thanks to: Fabian for the screenshots and text.