The Legend of Zelda: Ocarina of Time/Heart Containers

In Ocarina of Time, Heart Containers represent Link's health and life energy. The maximum number of Heart Containers that Link can have is twenty: he begins with three, and collects eight more after completing each of the eight dungeons in the game. The remaining nine are earned by collecting the 36 Heart Pieces hidden throughout the game. For each four Heart Pieces Link collects, another Heart Container will be added to his health.

The 36 Heart Pieces can be found in the following locations:

The Lost Woods

 * Lost Woods, child: Play Saria's Song to the Skull Kid to the left of the entrance, and he will give you a Heart Piece.
 * Lost Woods, child: Win the Skull Kids' memory game three times in the grotto to the right of the entrance to earn a Heart Piece and a handful of rupees. See the minigame section for further details.

Lon Lon Ranch

 * Lon Lon Ranch, child: There is a door to the north of Lon Lon Ranch, on the far wall to the right of the entrance. Inside, push the blocks to reveal a crawlspace in the corner. At the end of the crawlspace is the Heart Piece.

Hyrule Field

 * Hyrule Field, either: In the enclosure blocking the entrance to Lake Hylia, bomb the ground in the center to reveal a hole. Inside, a Deku Scrub will sell you a Heart Piece for 10 rupees.
 * Hyrule Field, adult: There is a hole near one of the trees west of Hyrule Castle. Inside, there is a Heart Piece several meters underwater. You need the Golden Scale (or Iron Boots) in order to get it.

Hyrule Castle Town

 * Hyrule Castle Town, child: A lady in a house in the alley has lost her white dog. Look for a white dog in the corner of the town near the Item Shop and get it to follow you. Return the dog to her for a Heart Piece.
 * Hyrule Castle Town, child: Complete the Treasure Chest game for a Heart Piece. See the minigame section for further details.
 * Hyrule Castle Town, child: A random prize in the Bombchu Bowling Game is a Heart Piece. See the minigame section for further details.

Kakariko Village

 * Kakariko Village, either: Either ride the owl from the summit of Death Mountain as a child to a rooftop in Kakariko Village, or as an adult hookshot onto the same roof. Go left and drop from the roof to a small platform above the Cucco pen, from which you can enter the house and claim a Heart Piece.
 * Kakariko Village, either: Collect 50 Gold Skulltula tokens for a Heart Piece.
 * Kakariko Village, adult: This Heart Piece is in the windmill. Complete Dampé's race and you will emerge in the windmill, opposite the Heart Piece.
 * Kakariko Village, adult: There is a lonely man sitting on the roof of the Potion Shop. Use the Longshot to access the roof and talk to him to receive a Heart Piece.
 * Kakariko Graveyard, child: A Heart Piece is one of the random prizes in Dampé's Heart-Pounding Gravedigging Tour. See the minigame section for further details.
 * Kakariko Graveyard, child: One of the graves on the top row can be pushed open. Inside is a Re-dead. Kill it and then play the Sun's Song to reveal a chest containing a Heart Piece.
 * Kakariko Graveyard, adult: If you have longshot then you go to the closest grave and stand on it, then shoot on the crate. Or else as a child, plant a magic bean in the soft soil near a ledge. Return as an adult, ride the platform, and break the crate for a Heart Piece.
 * Kakariko Graveyard, adult: Race Dampé's again and finish in under one minute. See the minigame section for further details.

Death Mountain

 * Death Mountain Trail, either: As a child, plant a magic bean in the soil just outside the entrance to Dodongo's Cavern. Ride the platform up above the entrance to the Heart Piece. Alternatively, backflip over the fence near the Bomb Flower to land on the ledge--you have to backflip into the corner toward the Heart piece.
 * Goron City, child: After opening Darunia's house, light the four torches around the pot at the bottom of Goron City. From the second level, throw a Bomb Flower into the top of the spinning pot to stop it. It will stop showing one of three faces, depending on what time you threw the bomb flower in. If the pot stops on 'happy', a Heart Piece will fly out.
 * Death Mountain Crater, adult: As a child, warp in using the Bolero of Fire and plant a magic bean in the nearby soil. Ride the platform as an adult until it reaches the Heart Piece in the smoke.
 * Death Mountain Crater, either: Either ride the bean platform or climb down the wall to the Heart Piece.

Zora's River

 * Zora's River, child: Pick up the Cucco at the Hyrule Field end and go to the small rise near the Water Tektites. Jump off it and float towards the platform with the Heart Piece.
 * Zora's River, child: Pick up the Cucco at the Hyrule Field end and carry it all the way to the waterfall. You will occasionally have to throw it onto a platform in order to climb up, and be sure not to throw the Cucco in the water. Once you have reached the waterfall, float over to the Heart Piece on the separated platform. This also works with the hover boots you get in Shadow temple.
 * Zora's River, child: Play the Song of Storms to the frogs on the log near the Water Tektites, and they'll give you a Heart Piece.
 * Zora's River, child: Complete the bug-catching game with the musical frogs to earn a Heart Piece. See the minigame section for further details.
 * Zora's Domain, child: Successfully light the torches near and behind the waterfall to make a chest appear which contains the Heart Piece. You can get a Deku Stick and run the flame from the throne room to the bottom of the stairs, then to just outside the shop, then to the torch in the water, and then behind the waterfall (without falling in the water). Alternatively, you can use Din's Fire behind the waterfall, then run a flame from behind the waterfall to the torch in the water, and then to outside the shop.

Lake Hylia

 * Lake Hylia, child: Catch a ten-pound fish in the Fishing Pond as a child. See the minigame section for further details.
 * Lake Hylia, adult: Dive to the bottom of the pool in the laboratory, then talk to the professor for a Heart Piece.
 * Lake Hylia, adult: As a child, plant a magic bean in the soil outside the laboratory. Return as an adult and ride the platform up to the roof, and climb the observatory to find this Heart Piece.

Zora's Fountain

 * Zora's Fountain, adult: On the farthest ice platform. You must jump onto several spinning ice platforms to reach it.
 * Zora's Fountain, adult: Once you've found the Iron Boots, sink to the bottom of the lake to find a Heart Piece.
 * Ice Cavern, adult: One of the side rooms has a blue fire fountain next to a block of red ice. Melt the ice for a heart piece.

Gerudo Valley

 * Gerudo Valley, adult: As a child, plant a magic bean in the soil on the stone platform along the cliff (you may need a Cucco to reach it). Ride the platform as an adult, and jump through the waterfall to this Heart Piece or put on your iron boots and walk under the water up the river to find a ladder.
 * Gerudo Valley, either: Along the cliff face is a crate containing a Heart Piece.
 * Gerudo Fortress, adult: On the roof of the middle building is a chest containing a Heart Piece.
 * Gerudo Fortress, adult: The prize for scoring at least 1000 points in the Horseback Archery game is a Heart Piece. See the minigame section for further details.
 * Desert Colossus, adult: As a child, warp here using the Requiem of Spirit and plant a magic bean in the soil here. Return as an adult and ride the platform to the nearby Heart Piece.