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