Here is the full list of all 52 .hack//G.U. Last Recode achievements.
Obtain all achievements.
Complete the "Chase the Bounty" campaign.
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.
Complete the "Bikman's Model" campaign.
Complete the "Lucky Data" campaign.
Complete the "Stray Mecha Grunty" campaign.
Complete the "Highway Master" campaign.
Perform 200 or more Awakenings.
Unlock all Terminal Disc files.
Watch an engagement event.
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.)
Complete Vol. 3 Redemption.
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 10 or more Avatar Awakenings.
Participate in 50 or more Arena matches.
Perform 50 or more counterattacks.
Win 1000 or more battles.
Complete Vol. 2 Reminisce.
Achieve an overall A-rank area result 50 or more times.
Conduct 50 or more trades with allies. (Allies will still count as allies before exchanging member addresses.)
Perform 500 or more surprise attacks.
Perform 300 or more Rengeki attacks.
Perform 50 or more Awakenings.
Win 500 or more times in Crimson VS in Vol. 2 and 3.
Alchemize 100 or more times.
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.)
Win 100 or more times in Crimson VS in Vol. 2 and 3.
Win 500 or more battles.
Ride your bike for over 30 minutes.
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.)
Give 30 or more gifts to allies. (Allies will still count as allies before exchanging member addresses.)
Complete the "Chim's Kicker" campaign.
Perform 100 or more Rengeki attacks.
Alchemize an item.
Perform 100 or more surprise attacks.
Defeat 5 or more PKers in the same volume.
Win 100 or more battles.
Ride your bike.
Speak to 10 or more PCs in the same volume.
Rescue Mecha Grunty 5 or more times.
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.)
Kick or use your bike to ram 30 or more Chim Chims.
Kick or use your bike to ram a Lucky Animal 5 or more times.
Achieve an overall S-rank area result.