Heart Pieces

There are 52 Pieces of Heart in Majora's Mask 3D, more than in any other Zelda game. Every four adds a heart, so all 52 give you 13 extra hearts; with the four Heart Containers from the temple bosses, Link goes from 3 hearts to 20. Many pieces are rewards for helping the people of Termina, so you will often have to come back on a particular day or with a particular mask. The Sheikah Stone can also show you hint photos for 23 of the pieces that aren't rewards for events.

Clock Town 17

1. Post Office timer game: between 6 PM and midnight on the first or second day, play the Postman's game and stop the counter at exactly 10 seconds. The Bunny Hood keeps the timer visible the whole time.
2. Clock Tower ledge: give the Moon's Tear to the Business Scrub in South Clock Town, then use his Deku Flower to float up to the ledge above the Clock Tower doors.
3. Changed The bank: deposit a total of 5,000 Rupees at the bank, which is now in South Clock Town.
4. The hand in the toilet: between midnight and 6 AM, go to the Stock Pot Inn's toilet on the upper floor (float onto the roof with the Deku Flower outside if you have no key) and give the hand a letter or the Land Title Deed.
5. North Clock Town tree: back in human form, climb onto the wooden platform near the slide in North Clock Town and jump to the tree.
6. Swordsman's School: score a perfect 30 on the Expert Course by doing a jump attack on every log.
7. Deku Scrub Playground: as Deku Link, beat the record at the playground in North Clock Town on all three days. Don't touch the stick while you float and you'll sink slowly instead of falling.
8. East Clock Town Shooting Gallery: score a perfect 50 points.
9. Honey & Darling: win the couple's game in East Clock Town on all three days.
10. Treasure Chest Shop: win the game in East Clock Town while wearing the Goron Mask.
11. The Rosa Sisters: get Kamaro's Mask by playing the Song of Healing for the ghost dancing on a pillar northeast of town after midnight. Then, on the first or second night, wear it and dance for the Rosa Sisters in West Clock Town.
12. Anju's Grandmother, first story: wear the All-Night Mask while she tells her first story and choose the top answer each time.
13. Anju's Grandmother, second story: listen to her second story with the All-Night Mask on and answer "I dunno".
14. Postman's Hat: earn the Postman's Hat during Anju and Kafei's quest, wear it and check any mailbox.
15. Couple's Mask: finish Anju and Kafei's quest and wear the Couple's Mask in the Mayor's office during the meeting in the Mayor's Residence.
16. Keaton: wear the Keaton Mask, cut a ring of grass that starts to dance, and answer all five of Keaton's questions correctly.
17. Gossip Stone grottos: in each of the four Gossip Stone grottos around Termina Field, play the Sonata of Awakening, Goron's Lullaby or New Wave Bossa Nova so all four stones glow the same color.

Termina Field and Romani Ranch 5

18. Milk Road grotto: drop into the hole in the grass near the entrance to Milk Road and defeat the Peahat.
19. Dodongo grotto: find the hole under one of the stone pillars in the northwest of Termina Field and defeat the two Dodongos.
20. Flying Business Scrub: from the Astral Observatory, watch the Business Scrub fly away from the Clock Tower and find the hole he lands in. Refuse his first price and buy the piece for 100 Rupees.
21. Beehive grotto: remove the boulder on the west side of Termina Field near the way to Great Bay, shoot down the beehives in the grotto, and dive for the piece as Zora Link.
22. Dog race: at Romani Ranch, bet 50 Rupees on a dog at Mamamu Yan's track and win. With the Mask of Truth you can hear which dogs feel confident.

Southern Swamp and Woodfall 6

23. Road to Southern Swamp tree: climb the vines on the tree near Tingle on the road to the swamp.
24. Swamp Shooting Gallery: score 2,000 points or more.
25. Pictograph contest: take a picture of Tingle or the Deku King and show it to the man in the Swamp Tourist Center.
26. Swamp Tourist Center roof: trade the Land Title Deed to the Business Scrub by the Tourist Center, then float from his flower to the roof.
27. Deku Palace: sneak through the western garden inside the palace to the end.
28. Woodfall: by the owl statue, float along the Deku Flowers around the edge of the area to a chest.

Snowhead and the Mountains 4

29. Goron Village ledge: trade the Swamp Title Deed to the Business Scrub in Goron Village, then float from his flower to the ledge above.
30. Frog choir: get Don Gero's Mask from the hungry Goron in Mountain Village by bringing him the Rock Sirloin from the spinning chandelier in the Goron Shrine. Wear it to gather the other frogs around Termina, then lead the frog choir in Mountain Village once spring has come.
31. Spring pond: after you defeat Goht, sink to the bottom of the pond south of the path between Mountain Village and Goron Village as Zora Link and open the chest.
32. Scarecrow on the way to Snowhead: teach a scarecrow a song, then on the road to Snowhead use the Lens of Truth to find the hidden platforms, play the song and Hookshot to the scarecrow that appears.

Great Bay 11

33. Marine Research Lab: pour at least four bottled fish into the small tank near the door until one fish grows big enough to eat the others and spits out a piece.
34. Zora Cape Like Like: defeat the Like Like at the bottom of the waterfall pool at the far east of Zora Cape.
35. Zora Hall jam session: learn the notes from the drummer's journal, play them with the bassist, then play the whole song behind the pianist without the Zora Mask.
36. Zora Hall ledge: trade the Mountain Title Deed to the Business Scrub in Lulu's room while wearing the Goron Mask, then float to the ledge.
37. Pirates' Fortress jail: as Goron Link, press the hidden floor switch upstairs and roll into the cell before the gate closes.
38. Pinnacle Rock: take a picture of a Gerudo Pirate, trade it to the fisherman for the Seahorse, then let the Seahorse loose at Pinnacle Rock and follow it to the piece.
39. Great Bay Coast bean plant: plant a Magic Bean in the soil on the ledges in the northeast of the coast, water it and ride it to the piece.
40. Beaver race, second win: at the top of the Zora Cape waterfall, win the beavers' race once for a bottle and again for a piece.
41. Fisherman's jumping game: after Gyorg, jump between the pillars on the fisherman's island and score 20 or more.
42. Oceanside Spider House: wearing the Captain's Hat, learn the order of the colored masks from the Stalchildren, shoot the masks in the dining room in that order, and go through the fireplace.
43. Ocean Title Deed: in Ikana Canyon, give the Ocean Title Deed to the Business Scrub near Sakon's Hideout as Zora Link, then float up to the platform as Deku Link.

Ikana 5

44. Iron Knuckle, second night: with the Captain's Hat, have the Stalchildren open the grave in Ikana Graveyard on the second night, find the hidden ways through with the Lens of Truth and bombs, and defeat the Iron Knuckle.
45. Changed Dampé, final night: with the Captain's Hat, go into the grave on the final night and help Dampé dig in the right places. Defeat the Big Poe and open the chest, which now holds a Piece of Heart (a Bottle on the Nintendo 64).
46. Poe Sisters: in the Spirit House in upper Ikana Canyon, pay 30 Rupees and defeat the Poe Sisters in time with three or more hearts left.
47. Ikana Castle roof: on the castle roof, shoot the crystal switch, then float from flower to flower as Deku Link to the chest.
48. Secret Shrine: swim up the river in Ikana Canyon to the Secret Shrine, open it with a Light Arrow on the sun, and defeat the four mini-bosses behind its doors. The man inside gives you the piece.

The Moon 4

49. Odolwa's trial: the Deku Link trial on the Moon.
50. Goht's trial: the Goron Link trial on the Moon.
51. Gyorg's trial: the Zora Link trial on the Moon.
52. Twinmold's trial: the human Link trial on the Moon.