GMO

GMO is a file format commonly used in PlayStation Portable games. It can contain model, animation and texture data. Files of this format always have a .gmo extension.

The first eleven bytes of the file have the value 0x4F4D472E30302E31505350 ("OMG.00.1PSP").

Tools

Noesis

For more details on this program, please visit the Noesis page.

Noesis allows you to convert GMO files into many common model formats. It also includes a batch option.

Gitmo

For more details on this program, please visit the Gitmo entry on the PlayStation Portable page.

List of games using the format

The list is not complete! Feel free to add other games that are known to use aforementioned format.

All of the following games are for PSP

Name	Compressed/Encrypted
Bleach: Heat the Soul 7	No
Bomberman	No
Bounty Hounds	Yes
Castlevania: Dracula X Chronicles	No
Dynasty Warriors	No
Dynasty Warriors 2	No
Dynasty Warriors 7	No
Exit	No
Exit 2	No
Fairy Tail: Portable Guild	Yes (CPK)
? Fairy Tail Portable Guild 2	? Yes
Fairy Tail: Zeref Kakusei	No
Final Fantasy: Dissidia	No
Final Fantasy: Dissidia Duodecim 012	No
Fate/tiger colosseum	No
Fate/unlimited codes	Yes
Fullmetal Alchemist: Brotherhood	?
Gitaroo Man Lives!	No
God Eater Burst	No
GripShift	No
Gundam Battle Royale	No
Gundam Battle Universe	No
Hajime no Ippo Portable: Victorious Spirits	No
Jeanne D'Arc	No
Kamen Rider: Climax Heroes OOO	?
Magical Girl Lyrical Nanoha A's Portable: The Battle of Aces	Yes
Magical Girl Lyrical Nanoha A's Portable: The Gears of Destiny	Yes
Namco Museum Battle Collection	No
Nendoroid Generation	No
One Piece: Romance Dawn	Yes
Patapon	No
Patapon 2	No
Practical Intelligence Quotient	No
R-Type Command	No
Rengoku 2	No
Shin Sangoku Musou 5 Special	No
Shin Sangoku Musou Multi Raid	No
Shin Sangoku Musou Multi Raid 2	No
Soul Eater: Battle Resonance	No
Star Ocean: First Departure	No
Sword Art Online: Infinity Moment	Yes (CPK)
Tales of VS	?
Ultimate Ghosts N' Goblins	No
Valhalla Knights	No

Some information was taken from wiki.xentax.com and forum.xentax.com.