Here is the full list of all 51 NEO: The World Ends with You achievements.
Collected all graffiti.
Purchased every type of fashion item.
Completed all Remind images.
Collected all pins.
Reached Level 100.
Collected all Secret Reports.
Collected all social network rewards.
Equipped a 6-pin set.
Won a 20-reduction chain battle.
Mastered 300 types of pins.
Earned all Scramble Slam rewards.
Collected all CDs.
Took down every type of enemy.
Erased all Pig Noise.
Completed Another Day.
Completed the Final Time Trial.
Took down 6,000 enemies.
Ordered one of every food item.
Collected 80% of all enemy dossiers.
Possessed ￥999,999.
Earned gold medals in 15 Dive missions.
Became a regular at every restaurant.
Connected your entire social network.
Completed the Final Day of Week 3.
Reached VIP Level 5 with every brand.
Mastered 200 types of pins.
Wore a party's worth of full outfits.
Became a regular at 8 restaurants.
Visited all areas of Shibuya.
Reached VIP Level 5 with 8 brands.
Took down 3,000 enemies.
Completed the Final Day of Week 2.
Erased a group of Noise using a Killer Remix.
Wore a full outfit of clothing whose abilities all require over 100 Style.
Reached VIP Level 5 with a brand.
Mastered 100 types of pins.
Won an 8-reduction chain battle.
Took down 1,500 enemies.
Landed enough Beatdrop Combos to boost your Groove above 200%.
Became a restaurant regular.
Completed the Final Day of Week 1.
Mastered 50 types of pins.
Wore a full outfit using a single brand.
Unlocked all of a full outfit's abilities.
Mastered 30 types of pins.
Wore a full outfit.
Exceeded 100% Fullness.
Mastered 10 types of pins.
Evolved a pin.
Mastered one type of pin.
Won your first battle.