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