Here is the full list of all 52 .hack//G.U. Last Recode achievements.
Obtain all achievements.
Participate in 200 or more Arena matches.
Perform 200 or more counterattacks.
Open the gallery after having collected all cards in Crimson VS in Vol. 3.
Unlock all Terminal Disc files.
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.
Perform 200 or more Awakenings.
Watch an engagement event.
Complete Vol. 3 Redemption.
Raise Haseo to level 150 in Vol. 3 or Vol. 4. (Using Cheat Mode does not count.)
Perform 10 or more Avatar Awakenings.
Complete Vol. 2 Reminisce.
Complete the "Highway Master" campaign.
Perform 50 or more counterattacks.
Conduct 50 or more trades with allies. (Allies will still count as allies before exchanging member addresses.)
Alchemize 100 or more times.
Win 1000 or more battles.
Participate in 50 or more Arena matches.
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.
Achieve an overall A-rank area result 50 or more times.
Ride your bike for over 30 minutes.
Collect a total of 60 or more 2nd Area Words in Vol. 2 or 3. (Carrying over save data is recommended.)
Perform 500 or more surprise attacks.
Perform 50 or more Awakenings.
Win 100 or more times in Crimson VS in Vol. 2 and 3.
Give 30 or more gifts to allies. (Allies will still count as allies before exchanging member addresses.)
Perform 300 or more Rengeki attacks.
Complete the "Chase the Bounty" campaign.
Collect a total of 60 or more 1st Area Words in Vol. 1, 2, or 3. (Carrying over save data is recommended.)
Win 500 or more battles.
Complete the "Stray Mecha Grunty" campaign.
Complete the "Lucky Data" campaign.
Complete the "Bikman's Model" campaign.
Collect a total of 60 or more 3rd Area Words in Vol. 1, 2, or 3. (Carrying over save data is recommended.)
Complete Vol. 1 Rebirth.
Complete the "Chim's Kicker" campaign.
Defeat 5 or more PKers in the same volume.
Alchemize an item.
Perform 100 or more Rengeki attacks.
Perform 100 or more surprise attacks.
Give a gift to an ally. (Allies will still count as allies before exchanging member addresses.)
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.)
Rescue Mecha Grunty 5 or more times.
Kick or use your bike to ram 30 or more Chim Chims.
Ride your bike.
Achieve an overall S-rank area result.
Speak to 10 or more PCs in the same volume.