Gameplay involves exploring various worlds within the NerveGear, battling enemies and completing quests to uncover the truth about Kite's past. Players can form bonds with other characters, known as "Link Alliances", which grant access to new areas and abilities.
.hack GU Rebirth features a unique gameplay mechanic called "Rebirth", where players can reincarnate themselves in a previous game world, allowing for multiple playthroughs and increased replay value. The game also includes an online multiplayer component, enabling players to interact with each other's avatars.