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.
Unlock all Terminal Disc files.
Watch an engagement event.
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.
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.)
Complete Vol. 3 Redemption.
Perform 10 or more Avatar Awakenings.
Complete Vol. 2 Reminisce.
Perform 200 or more Awakenings.
Win 1000 or more battles.
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.
Complete the "Highway Master" campaign.
Win 100 or more times in Crimson VS in Vol. 2 and 3.
Perform 500 or more surprise attacks.
Collect a total of 60 or more 2nd Area Words in Vol. 2 or 3. (Carrying over save data is recommended.)
Perform 300 or more Rengeki attacks.
Collect a total of 60 or more 1st Area Words in Vol. 1, 2, or 3. (Carrying over save data is recommended.)
Alchemize 100 or more times.
Conduct 50 or more trades with allies. (Allies will still count as allies before exchanging member addresses.)
Complete the "Chase the Bounty" campaign.
Complete the "Stray Mecha Grunty" campaign.
Complete the "Lucky Data" campaign.
Win 500 or more battles.
Complete the "Bikman's Model" campaign.
Participate in 50 or more Arena matches.
Perform 50 or more Awakenings.
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.
Complete Vol. 1 Rebirth.
Perform 50 or more counterattacks.
Defeat 5 or more PKers in the same volume.
Complete the "Chim's Kicker" campaign.
Conduct a trade with an ally. (Allies will still count as allies before exchanging member addresses.)
Give 30 or more gifts to allies. (Allies will still count as allies before exchanging member addresses.)
Perform 100 or more Rengeki attacks.
Perform 100 or more surprise attacks.
Win 100 or more battles.
Rescue Mecha Grunty 5 or more times.
Kick or use your bike to ram a Lucky Animal 5 or more times.
Alchemize an item.
Achieve an overall S-rank area result.
Kick or use your bike to ram 30 or more Chim Chims.
Ride your bike.
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.