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