No missable achievements (plus 63 unknown)
Sign in with Steam or Xbox to track your progress, and:
Defeat your first Unique Enemy.
Acquire your first ArFA-sys part.
Acquire your second ArFA-sys part.
Acquire a Legendary weapon.
Appraise items 15 times.
Change the color of an outfit.
Acquire your third ArFA-sys part.
Participate in an online co-op quest.
Have a sleepover.
Grow close to your ArFA-sys.
Give your ArFA-sys an allowance of 100,000 credits or more.
Defeat the SBC Flügel's gate keeper.
Become the leader of a new squadron.
Exchange medals for items 3 times.
Purchase info from Argo.
Grow close to Kureha.
Defeat the final boss of the SBC Flügel.
Reach the maximum level for a weapon category.
Reach max level of a skill or gadget.
Enhance or transform weapons 10 times.
Deepen your friendship with Premiere, Strea, Philia, and Rain.
Beat the game with the normal ending (Zeliska's death).
Defeat Death Gun in the BoB.
Grow close to Kirito, Asuna, Leafa, Sinon, Lisbeth, Silica, Agil, Klein, Yuuki, Yui, and Argo.
Participate in an online PvP match.
Defeat 10 types of bosses in online co-op quests.
Beat the game with the normal ending (Kureha's death).
Reach level 100.
Grow close to Zeliska.
Receive a gun from Itsuki.
Give a friend an outfit as a present.
Have one stat of 150 or higher.
Create 5 outfits.
Acquire all Weapon Arts.
Beat the game with the true ending.
Obtain one of the weapons added in "Dissonance of the Nexus."
Complete every Hunting Quest.
Complete every Solo Hero Quest.
Make it into the Bounty Ranking Top 10.
Complete every Unique Enemy Quest.
Reach 1st place in the Bounty Rankings.
Grow close to Asuna, Leafa, Sinon, Lisbeth, Silica, and Yuuki in Kirito Mode.
Meet up with Sachi.
Shut down the snowmaker.
Defeat the Snowstorm Queen.
Reach affinity level 4 with all friends (excluding additional characters).
Defeat the Freezing Menace.
Complete every Treasure Quest.
Win 5 online PvP matches.
Beat the game on Extreme difficulty.
Reach level 270.
Complete 12 Hardcore Co-op Quests.
Receive mail from an unknown sender.
Have a sleepover with Sachi in Kirito Mode.
Have sleepovers with Yuna, Eiji, and Seven.
Complete 15 types of Party Hero Quests.
Acquire 100 skills and/or gadgets.
Reach the maximum level for all weapon categories.
Defeat Snowstorm Ereshkigal on Extreme difficulty.
Defeat Cocytus Nifta on Extreme difficulty.
Craft a Chic Dress F.
Collect all Emblem Earrings and create a School Uniform F.
Acquire all achievements.