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