Grab Bag - These items refer to individually numbered containers received from Gaia NPCs, namely Jack and Shopkeepers. These containers are obtained by collecting a specific amount of candy and then 'talking' to the NPC upon completion. These grab bags date back to 2003.
Jack's series - Given various names over the years, such as 'Jacked-Up' and 'Jack'd', the "Jack" series are themed apparel and accessories stylized after Jack. These often are obtain through grab bags, while others have been gotten by collecting candy. They are primarily black and orange in color. This series began in 2003.
[CORP]oration items - These are stylized apparel and accessories that relate to a character group. For example G CORP, which is known for human and zombie characters. These items are obtained by siding with a group for the sake of battling an opposing group. These types of items began in 2004.
Faction items - Similar to corporation items in that it means siding with a character group to obtain their items. There are four major factions in the world of Gaia: Humans, Vampires, Zombies, and Dark Elves. This dates back to 2004 and 2007.
Shop items - Stocked in shops, these are items released for the sake of the season or for the theme of the event. Unlike event items they cost gold, stickers, or cash.