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.
Complete Vol. 3 Redemption.
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.)
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.
Raise Haseo to level 150 in Vol. 3 or Vol. 4. (Using Cheat Mode does not count.)
Perform 10 or more Avatar Awakenings.
Complete Vol. 2 Reminisce.
Complete the "Highway Master" campaign.
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.
Win 500 or more times in Crimson VS in Vol. 2 and 3.
Participate in 200 or more Arena matches.
Perform 200 or more counterattacks.
Perform 50 or more counterattacks.
Participate in 50 or more Arena matches.
Complete the "Chase the Bounty" campaign.
Perform 200 or more Awakenings.
Win 1000 or more battles.
Complete the "Lucky Data" campaign.
Alchemize 100 or more times.
Complete the "Stray Mecha Grunty" campaign.
Complete the "Bikman's Model" campaign.
Perform 300 or more Rengeki attacks.
Achieve an overall A-rank area result 50 or more times.
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.)
Perform 50 or more Awakenings.
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.)
Conduct 50 or more trades with allies. (Allies will still count as allies before exchanging member addresses.)
Win 500 or more battles.
Perform 100 or more Rengeki attacks.
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.
Defeat 5 or more PKers in the same volume.
Complete the "Chim's Kicker" campaign.
Perform 100 or more surprise attacks.
Ride your bike for over 30 minutes.
Win 100 or more battles.
Give 30 or more gifts to allies. (Allies will still count as allies before exchanging member addresses.)
Alchemize an item.
Ride your bike.
Rescue Mecha Grunty 5 or more times.
Kick or use your bike to ram a Lucky Animal 5 or more times.
Give a gift to an ally. (Allies will still count as allies before exchanging member addresses.)
Achieve an overall S-rank area result.
Kick or use your bike to ram 30 or more Chim Chims.