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