Guilds
New in .hack://G.U. are guilds which act as a base for Haseo. All guilds are located in the mercenary district of town, but you cannot enter a guild until you receive a key. Early in the game Haseo gets access to Raven guild filled with insiders from CC corp. Haseo can meet with other members here and store extra items once his inventory is full.
Chim Chims
All around the World are egg like Chim Chims. Some are hiding in holes and will appear when Haseo presses a button. Chim Chims can also be found by looking for tiny trains on the walls. These trains typically have steam vents nearby, which can knock Chim Chims to the ground. Once they appear Chim Chims begin scattering on the ground and Haseo needs to run up to kick one of these to gain Chim to open doors. Chim also has a second purpose, Dr. Kubo is collecting Chim data from Haseo. If you report back to him with excess Chim he will reward Haseo with items.