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