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