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