Monster Hunter G is a Japan-exclusive game for PlayStation 2. It is an expansion to the original Monster Hunter with more quests, weaponry, and Subspecies of its existing monsters. Due to the series lack of popularity overseas, this PS2 title never made it outside of Japan. In 2006, however, Monster Hunter Freedom was released for the PSP, which is based on the content of MHG, albeit with several differences.
New skill system that was operated by numbers rather than armor.
New "G" rank quests.
Higher sharpness levels.
Monster Hunter G was re-released on the Wii in Japan on Apr 23, 2009 bundled with a Monster Hunter G Classic Controller and a demo of Monster Hunter 3. It features a few differences with the PS2 version:
The controls are based on that of the Freedom series games, with the right analog stick being used for the camera.
Weapon handling and moveset is based on that of 2nd generation games, with such additions as the Greatsword Charge and the Sword and Shield shielding Upswing, the game does not contain 2nd generation weapons.
You start the game with 1 of each available weapon and basic armor.
The weapon shop and smithy have a preview screen for equipment.