Here is the full list of all 52 .hack//G.U. Last Recode achievements.
Obtain all achievements.
View all Parody Mode content.
Unlock all Terminal Disc files.
Complete the "Chase the Bounty" campaign.
Open the gallery after having collected all cards in Crimson VS in Vol. 3.
Complete the "Bikman's Model" campaign.
Complete the "Lucky Data" 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. 4 Reconnection.
Watch an engagement event.
Win 500 or more times in Crimson VS in Vol. 2 and 3.
Achieve an overall A-rank area result 50 or more times.
Participate in 200 or more Arena matches.
Perform 200 or more counterattacks.
Win 100 or more times in Crimson VS in Vol. 2 and 3.
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.
Alchemize 100 or more times.
Complete the "Stray Mecha Grunty" campaign.
Conduct 50 or more trades with allies. (Allies will still count as allies before exchanging member addresses.)
Win 1000 or more battles.
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 500 or more surprise attacks.
Perform 10 or more Avatar Awakenings.
Perform 50 or more counterattacks.
Participate in 50 or more Arena matches.
Complete Vol. 2 Reminisce.
Win 500 or more battles.
Perform 300 or more Rengeki attacks.
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.
Give 30 or more gifts to allies. (Allies will still count as allies before exchanging member addresses.)
Alchemize an item.
Ride your bike for over 30 minutes.
Collect a total of 60 or more 3rd Area Words in Vol. 1, 2, or 3. (Carrying over save data is recommended.)
Defeat 5 or more PKers in the same volume.
Complete Vol. 1 Rebirth.
Conduct a trade with an ally. (Allies will still count as allies before exchanging member addresses.)
Complete the "Chim's Kicker" campaign.
Speak to 10 or more PCs in the same volume.
Perform 100 or more surprise attacks.
Rescue Mecha Grunty 5 or more times.
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.
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.
Achieve an overall S-rank area result.