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