Bonus keywords
Enter the following bonus keywords from various episodes,
commercials, and ads to reach the corresponding area.
Sickened Imprisoned Fallen Angel
Confused Fool's Hideout
Reincarnated Elusive Lyric Poet
DVD secrets
The DVD that is included with the game has a secret
section. It reveals secrets in the game. Enter the "Data"
menu and highlight the ".hack Pro Trailers" option.
Press [Right] to highlight a circular icon. Press [X]
or [Enter] to view the secrets.
Easier game
It is much easier if you have a Wavemaster in your
party, whether it is Elk, Wiseman, or someone else; and also have
a heavy blade person. This helps very much. Also keep your other
members leveled up with you because you have to use them at times.
Buy items such as Speed Scroll, Warrior Blood, Hermit Blood, etc.
to have a better boosted character.
Easy weapon and armor power up
Use the following trick to get the highest level for
your weapons and armor per server. When at the Choas Gate to choose
a place to go, choose "New Keywords" instead of "Random".
Here is a simple formula to choose your keywords to get a Monsenor
(Blue) to upgrade your weapons: Enter anything for the first two
words, then "Aqua Field(Hypha)" for the last word. To
get a Granpa (Red) to upgrade your weapons, enter "Lonely(Great)"
for the first word, anything for the second word, then "Aqua
Field(Hypha)" for the last word. To get a Monsenor(Blue)
to upgrade your armor, enter anything for the first two words,
then "Twin Hills" for the last word. To get a Granpa
(Red) to upgrade your armor, enter "Lonely(Great)" for
the first word, anything for the second word, and "Twin Hills"
for the last word.
Exit dungeons quickly
Whenever you get lost in a dungeon, for example one
that is crawling with Data Bugs, and you need the fastest route
out; or if you just want to exit, remember that you can also use
the Fairies Orb inside the dungeon as well as outside.
Additional characters
After you defeat the final Boss and the credits roll,
save your game. When your desktop appears you will have new mail.
Read the e-mail from Aura (which is unscrambled unlike her others).
She tells you to go to Delta: Bursting, Passed Over, Aqua Field
with Orca, who is now out of the hospital. Go to the bottom of
the dungeon and Aura will give you the Book Of Daybreak, which
allows you to use your Data Drain and Gate Hacking abilities again.
After you log out, you will receive a message from Helba. She
gives you member addresses for a lot of characters from .Hack//Sign,
along with hers. The members addresses you get are for Helba (Wavemaster
at level 99 with maxed out stats because she is a hacker), Tsukasa
(Wavemaster at level 1), Subaru (Heavy Axeman at level 15), and
Sora (Twin Blade at level 90). You will also receive another e-mail
from Aura after receiving the Book Of Daybreak. You will get the
Keyword Omega: Hidden, Darkside, Holy Ground. You will be accompanied
by Elk for this dungeon; choose another character that has good
strength. When you get to the last floor (there are fifteen floors
and each contains many Data Bugs), you will fight a boss which
resembles the guardian from .Hack//Sign and the Gate Hacked dungeons
you went to earlier in the game. When you defeat the Boss, you
will be able to choose Mia as a character again and receive two
FMV sequences to watch on your desktop.
Rocker Grunty
A Rocker Grunty requires four Cordycepts and eighteen
Golden Eggs.
Grunty food
An easy way to get food for Grunties is to go to the
areas where you played tag with the Goblins. There usually is
a lot of food there, and no monsters.
When you are looking for Grunty food in the field, call Noble
Grunty and press [Triangle]. He will automatically track
down Grunty food for you. Also, Aqua Grunty and Rocker Grunty
will take you to the dungeon if you are too far away from the
dungeon.
Drain Heart
Drain Heart allows you to 2128 Drain multiple enemies.
The chance of getting a rare item is high. You can get this after
you have obtained all of the Book of 1000 Enhancements and after
you have gotten Data Arc and 2128 Drain . After you have 2128
Drain, you must use Data Drain many times to get Drain Heart.
Opposites
The characters in game and the television series .hack//sign
are similar in appearances, but different in personalities. The
following is a list of the game characters and their opposites.
| Game | Series |
| Gardinea | BT |
| Orca | Bear |
| BlackRose | Mimiru |
| Marlo | Silver Knight |
| Nuke Usagimaru | Crim |
| Moonstone | Sora |
| Terajima Ryoku | Subaru |
| Natsume | A-20 |
| Elk | Tsukasa |