Powering Up
Acquire your first ArFA-sys part.
You'll earn this achievement when you finish the ArFA-sys Parts (6th) Main Quest.

Second Helping
Acquire your second ArFA-sys part.
You'll earn this achievement when you finish the Searching for Parts (9th) Main Quest.

Triple Tune-Up
Acquire your third ArFA-sys Part.
You'll earn this achievement when you finish the Collecting Parts (12th) Main Quest.

Attack on the SBS Flugel!
Defeat the SBC Flugel's gatekeeper.
You'll earn this achievement when you finish the The Gatekeeper (14th) Main Quest.

Squad Leader
Become the leader of a new squadron.
You'll earn this achievement when you finish the A New Squad (15th) Main Quest.

Hero of Legend
Defeat the final boss of the SBC Flugel.
You'll earn this achievement when you finish the Mother Claudia (18th) Main Quest.

Bullet of Bullets
Defeat Death Gun in the BoB.
You'll earn this achievement when you finish the Bullet of Bullets Main Quest in Kirito Mode.

The achievements for game endings are at the end of the guide as they contain spoilers and 2 of which can also be missable.

Bounty Hunter
Complete every Hunting quest.
You'll earn this achievement after you complete all 24 Hunting Quests.
NOTE: A couple of the last ones for killing players by the Forgotten Temple are actually located in Solitary Sands in the Industrial Zone (VR Escapism and Solemn Atonement)

Seeker of Fortune
Complete every Treasure quest.
You'll earn this achievement after you complete all 24 Treasure Quests.

Reaper
Complete every Unique Enemy Quest.
You'll earn this achievement after you complete all 15 Unique Enemy Quests.

Master and me Will always Be Together!
Grow close to your ArFA-sys.
You'll earn this achievements once you hit affinity level 4 with ArFA-sys and do all of his/her green balloon events up to that point.

You Belong to Me!
Grow close to Kureha.
You'll earn this achievements once you hit affinity level 4 with Kureha and do all of her green balloon events up to that point.

Right-Hand Woman
Grow close to Zeliska.
You'll earn this achievements once you hit affinity level 4 with Zeliska and do all of her green balloon events up to that point.

Gift off a Gun
Receive a gun from Itsuki.
You'll earn this achievements once you hit affinity level 4 with Itsuki and do all of his green balloon events up to that point.

Try It On?
Give a friend an outfit as a present.
once you get Itsuki to affinity rank 4, you can go to his squadron room and gift him an outfit in your inventory, Alternatively you can do this for Premiere, find her in the Lobby and give her an outfit instead, doing either nets you the achievement.

Popular Player
Deepen your friendship with Premiere, Strea, Philia, and Rain.
You'll earn this achievement when you hit affinity level 2 with each of the listed characters and do each of their green balloon events.

Proof of Friendship
Grow close to Kirito, Asuna, Leafa, Sinon, Lisbeth, Silica, Agil, Klein, Yuui, Yui, and Argo.
You'll earn this achievement when you hit affinity level 2 with each of the listed characters and do each of their green balloon events.

Naptime
Have a sleepover
You'll earn this achievement when you finish a date with the right choice with any of these characters: Arfa-sys, Kureha, Zeliska, Itsuki, Bazalt Joe, Rain, Philia or Strea.

That's Kirito for You
Grow close to Asuna, Leafa, Sinon, Lisbeth, Silica, and Yuuki in Kirito Mode.
for each of the listed characters, raise their affinity to rank 4, Kirito Mode shares Affinity with your normal mode so you dont need to worry about which one your on, and then in Kirito mode go to the Lobby and do each of the characters Green Balloon events.

Best Friends Forever
Reach affinity level 4 with every friend.
For every main character reach rank 4 affinity and do all of their green balloon events up to that point. (this excludes LLENN, Fukaziroh, Pitohui and M.)

Weaver
Create 5 outfits.
For this you just need to craft 5 outfits at Asuna, they can be the same 5 outfits it just needs to be 5 instances of crafting.

Tinkerer
Enhance or transform weapons 10 times.
You can get this one much easier by using transforming over enhancing at Lisbeth, since the materials for it are more easily accessed, just go to the medal trader if you need more chips.

Appraiser
Appraise items 15 times.
You'll easily get this over the course of the game, if you wanna rush it just up luck so you get more items to appraise for Agil.

Trader
Exchange medals for items 3 times.
Once you've earned some medals, talk to an NPC in the Lobby at SBC Glocken, she is standing in the center wearing blue, just carry out any 3 of her many transactions and you'll get the achievement.

The Info Broker
Purchase info from Argo.
Argo is located in SBC Glocken underneath the Base Station fast travel point, jsut buy any of the weapon arts and you'll get the achievement.

Allowannce, Please!
Give your ArFA-sys an allowance of 100,000 credits or more.
After progressing far enough in the story you'll be able to give you ArFA-sys an allowance to go buy things for her/himslel and you, simply give them 100k credits and you'll unlock the achievement.

Color Coordinated
Change the color of an outfit.
Again after progressing enough int he story, you'll be able to change the colours of weapons and outfits for you and your ArFA-sys in the ArFA-sys menu, just do this for an outfit and you'll get the achievement.

Master of the Arts
Acquire all Weapon Arts.
At Argo buy all of the Weapon Arts she sells aside from that you also need to finish kirito mode in order to get a weapon art for completing that, once you get the last weapon art you need the achievement should pop.

OP
Have one stat of 150 or higher.
As it says one of your stats just needs to hit 150, id reccomend not worrying about doing this untill you hit some of the higher levels, once youre there, just go to the terminal in your home and access the customization slots, save your current stuff to one of them so you dont lose it and load one of the empty ones, this will reset your stats to 1 and you can go in and boost one of them to 150, once youve done this you can load your old build and nothign is lost.

Maxed Out
Reach the maximum level with a skill.
Just make sure to keep one skill on you at all times and spam it whenever its ready, itll hit 100% proficiency pretty quickly, if you need to change them for a different weapon use the terminal in your home.

Weapon Master
Reach the maximum level for a weapon category.
For this you need to reach 1000 weapon prificiency on a gun type, this is definately easier on faster firing weapons such as gatling guns or sub machine guns since i believe raising it is based on number of hits, though that needs verification, its definately not kills seeing as one run of gatling on a single boss gave me more points than using a sniper throughout an entire area.

Collector
Acquire 100 skills and/or gadgets.
For this you'll need to use quite a few different skills to up their proficiency to unlock the higher level variants, to unlock the second rank of a skill you need to reach 50% proficiency with the rank 1 version of the skill and to unlock the second rank of a skill you need to reach 100% proficiency with the rank 2 version of the skill. Most of the tier 3 variants of skills also have very high stat requirements, largely being in the 100+ zone. Should unlock when you purchase your 100th skill and/or gadget cumulatively.

The Ultimate Warrior
Reach the maximum level for all weapon categories.
Hit proficiency 1000 on all 9 weapon types, you can check your current wepaon proficiency levels in the 5th page of your characters status window, id reccomend using slower weapons throught the game since faster firing weapons will be easier to grind through.

Welcome to the World of Co-op
Participate in an online co-op quest.
Just play through one of the Co-op quests, you can do this solo you jsut need to host a lobby and start it by yourself.

Boss Hunter
Defeat 10 types of bosses in online co-op quests.
Again this can be done solo if need be, as you progress int he main story you'll unlock more co-op quests to choose from, just play down the list and you'll get it eventually.

Welcome to the World of PvP
Participate in an online PvP match.
This Achievement will pop as soon as you finish a PvP match, regardless of whether its a win or loss, this can be done with friends.


Veteren Gunslinger
Win 5 online PvP matches.
This achievement will pop once you win 5 PvP matches, can be done with friends.
Now ive confirmed this is doable with friends if need be feel free to add me if you would like help with this and the previous achievement, though keep in mind i wont always be available to help.

Uniquely Dead
Defeat your first Unique Enemy.
You'll get this pretty quickly in the first area, not one you need to worry too much about getting specifically since bosses also count as unique enemies.

Oooh, Shiny!
Acquire a Legendary weapon.
Legendaries are green coloured objects, this mostly comes down to luck as to when you get it but you should eventually get one over the course of the game, if need be up your luck stat or grind lower areas, they seem to drop rarer versions of its loot easier, though thats just guesswork.

GGO God
Beat the game on Extreme difficulty.
When you go into new game+ you'll unlock the extreme difficulty to play, you just need to defeat the final boss, no matter the ending, with extreme difficulty on, if you play through on anythign else or change it temporarily it doesnt affect the achievement, aslong as you are in extreme when you beat the last quest and go through to the credits.

Ranker
Make it into the Bounty Ranking Top 10.
Every time you return to the SBC Glocken from the field you earn bounty based on a number of different things, roughly you'll need to get this up to around 9.7 million for top 10, you can check your position at the yellow haired NPC in the center of the lobby and in order for the achievement to tick you'll need to interact with her when you're in the top 10. The most efficient method ive found thus far for doing this is bouncing between the two Unique enemies in the Remnant wasteland, the extra kills and items along the way also help and later on when you can kill them very quickly you can rack up a lot of bounty pretty fast. Bounty also carries over into new game+ so you dont need to worry about doing it in a single run and it would be better to grind in new game+ on extreme difficulty since you earn more bounty in general on extreme.

Top Dog
Reach 1st place int he Bounty Rankings.
As with above just you need to reach nearly 10 million bounty instead and Similarly you need to talk to the Yellow haired NPC when you're in the top spot for the achievement to tick.

Elite Player
Reach level 100.
Just as said, you'll easily get this running throught he game twice for extreme difficulty.

Award Hunter
Acquire all achievements.

A True Hero
Beat the game with the true ending.
Earning this ending requires checking a few boxes, personally i left this ending till last since i did the other two first, followed by the grinding for affinity achievements to then do the last one, if your going to be efficient about it though id probably leave one of the two bad endings till completing new game + in extreme mode so you dont go through more rewinds.

First of, make sure you dont complete the SBC Flugel main quests since doing so causes party members to leave and you might not have their affinities at the required level. Also if you get a message pop up when talking to ArFA-sys that mentions Kirito Mode becoming unavailable, dont progress past that point.

Second, get the ArFA-sys, Kureha, Zeliska, Itsuki and Bazalt Joe characters to affection level 4 75% and view all of their green balloon events up to that point.

Third, get the Kirito, Asuna, Sinon, Premiere, Strea, Philia, Rain, Agil, Klein, Argo, Leafa, Lisbeth, Silica and Yuuki characters to affection level 2 and do each of their green balloon events.

Fourth, if you haven't already, go and clear Kirito mode so that you unlock getting the ArFA-sys Charm, this will trigger once you return to your normal game after finishing the mode and you go into your home while all the characters are at the appropriate affection levels.

Fifth, if you havent already, make sure you done the subquests for asuna, agil and lisbeth for making an outfit, appraising an item and enhancing a weapon respectively.

Lastly, go murder that final boss, make sure not to let it carry out its big attack since this can cause a bad ending if you get hit by it, just hit its core with enough damage and you'll stun it out of the attack. (may require choosing to save Zeliska over Kureha, not confirmed, may also need to finish atleast one of the bad ends before getting the charm, also not confirmed)

A Lost Friend
Beat the game with the normal ending (Kureha's death)
Simply fail to complete the conditions for completing the true ending and when you speak to your ArFA-sys before starting the final confrontation, select to protect Zeliska.

Fall of the Uncrowned Queen
Beat the game with the normal ending (Zeliska's death)
Simply fail to complete the conditions for completing the true ending and when you speak to your ArFA-sys before starting the final confrontation, select to protect Kureha.

The following people pointed something out that was wrong in my guide or that i missed, thanks for making the guide more accurate peeps.

Yuuki Haruka - added completing kirito mode for a weapon art
FlamingGinger - did the PvP with me and confirmed the 2 achievements are doable with friends
Kanna, Firestar1212 - made me realise i worded part of the endings poorly, reworded to be less confusing
[LPG] Neox - asked for clarification on Best friends forever so added note on not needing the 4 characters added post launch
[N7] Klaptrap - pointed out you can also gift Premiere an outfit instead of Itsuki