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