Hidden Keywords (Games Tetralogy)

Players start with a basic list of keywords. As they progress through the story of the Games Tetralogy more keywords will be acquired. Because of this, not all combinations are initially accessible.
In-game, players can acquire additional field addresses from speaking to other players, reading the BBS, and E-mail. There are also "Hidden" area keywords that can be found outside of regular gameplay. Some methods of finding these keywords include other .hack media, Advertisements, and merchandise packaging.

Hidden Keywords by Volume

Infection

Main articles: Hidden Keywords (Infection)

Keyword		Keyword Source	Items
Δ	Voluptuous Her Remnant	Liminality DVD	Rusty Nails
		SIGN DVD Cover	Kagayuzen
Δ	Hideous Organ Market Scaffold	Liminality DVD	Ice Bar
θ	Dog Dancing Passionate Tri Pansy	Liminality DVD	Soul Blades
			Ceramic Helm

Mutation

Main articles: Hidden Keywords (Mutation)

Keyword		Keyword Source	Items
Λ	Capricious Unending Corridor	Liminality DVD	Gemini Soul
			Chinese Food
Λ	Bottomless Soul Kaleidoscope	SIGN DVD Cover	BL Yokohama
Λ	Lightless Sacred Remains	SIGN DVD Cover	Bent Glasses
		AI buster

Outbreak

Main articles: Hidden Keywords (Outbreak)

Keyword		Keyword Source	Items
Σ	Barking Hot-Blooded 500 Lohan	Liminality DVD	Lady Gloves
			Magnolia Miso
Σ	Unusual Ghostly Remnant	Liminality DVD	Doll Amulet
Σ	Noisy Sacred Ringing Ears	Liminality DVD	3 Floor Tower
Σ	Ancient Destroyer's Battlefield	SIGN DVD Cover	Lady Shoes
			Scent of Gero
Σ	Greedy Gambler's Drift	SIGN DVD Cover	Lady Killers
			Boxed Lunch
Σ	Entwined Prejudiced Chaos	SIGN DVD Cover	Kokoro
			Rouge Fragment
Σ	Tested Morphean Alchemy	SIGN DVD Cover	Vampire's Blades
			Field's Deed
Σ	Abrasive False Tragedy	Magazine Advertisement	Bear's Sword
			Maiden's Plot

Quarantine

Main articles: Hidden Keywords (Quarantine)

Keyword		Keyword Source	Items
Ω	Sickened Imprisoned Fallen Angel	Liminality DVD	Risky Coffee
		AI buster
Ω	Reincarnated Elusive Lyric Poet	Magazine Advertisement	Christmas Card