Here is the full list of all 52 .hack//G.U. Last Recode achievements.
Obtain all achievements.
Complete Vol. 4 Reconnection.
View all Parody Mode content.
Reach guild rank 9 by raising all books in the Book of 1000 to rank 9 in Vol. 3 after having carried over your save data from Vol. 1 and 2.
Raise Haseo to level 150 in Vol. 3 or Vol. 4. (Using Cheat Mode does not count.)
Participate in 200 or more Arena matches.
Perform 200 or more counterattacks.
Perform 200 or more Awakenings.
Unlock all Terminal Disc files.
Watch an engagement event.
Open the gallery after having collected all cards in Crimson VS in Vol. 3.
Complete Vol. 3 Redemption.
Perform 10 or more Avatar Awakenings.
Perform 300 or more Rengeki attacks.
Complete the "Highway Master" campaign.
Participate in 50 or more Arena matches.
Perform 50 or more Awakenings.
Complete Vol. 2 Reminisce.
Win 1000 or more battles.
Win 500 or more times in Crimson VS in Vol. 2 and 3.
Collect a total of 60 or more 2nd Area Words in Vol. 2 or 3. (Carrying over save data is recommended.)
Perform 50 or more counterattacks.
Win 100 or more times in Crimson VS in Vol. 2 and 3.
Finish first on any course in the "Highway Master" campaign. (After obtaining the 1st Word "Passing" in Vol. 2, you can attempt Bike Missions before beginning the campaign in Vol. 3.)
Collect a total of 60 or more 1st Area Words in Vol. 1, 2, or 3. (Carrying over save data is recommended.)
Alchemize 100 or more times.
Give 30 or more gifts to allies. (Allies will still count as allies before exchanging member addresses.)
Conduct 50 or more trades with allies. (Allies will still count as allies before exchanging member addresses.)
Complete the "Chase the Bounty" campaign.
Complete the "Stray Mecha Grunty" campaign.
Complete the "Lucky Data" campaign.
Perform 500 or more surprise attacks.
Achieve an overall A-rank area result 50 or more times.
Ride your bike for over 30 minutes.
Win 500 or more battles.
Complete the "Bikman's Model" campaign.
Collect a total of 60 or more 3rd Area Words in Vol. 1, 2, or 3. (Carrying over save data is recommended.)
Complete Vol. 1 Rebirth.
Defeat 5 or more PKers in the same volume.
Perform 100 or more Rengeki attacks.
Complete the "Chim's Kicker" campaign.
Rescue Mecha Grunty 5 or more times.
Perform 100 or more surprise attacks.
Win 100 or more battles.
Kick or use your bike to ram a Lucky Animal 5 or more times.
Conduct a trade with an ally. (Allies will still count as allies before exchanging member addresses.)
Alchemize an item.
Ride your bike.
Give a gift to an ally. (Allies will still count as allies before exchanging member addresses.)
Kick or use your bike to ram 30 or more Chim Chims.
Speak to 10 or more PCs in the same volume.
Achieve an overall S-rank area result.