Lego Harry Potter Years 1-4 was developed by Traveler's Tales, the maker of the LEGO parody video games. The game is based on the first four books and films of the Harry Potter series: The Sorcerer's Stone, The Chamber of Secrets, The Prisoner of Azkaban, and The Goblet of Fire. This is the biggest LEGO game yet, featuring a total of 167 unlockable characters as well as hours of hidden collectibles, bonus levels, two different hub worlds to explore, and more. This walkthrough covers the story mode and all the collectibles and unlockables in the game.

When players start a new file, they will begin by starting the story level "The Magic Begins". After beating it, you will end up in the Hogwarts hub level. Inside Hogwarts, always follow the ghost to your next objective, unless you wish to explore Hogwarts for unlockables.

At anytime in a story level, you can quit and exit back to Hogwarts. Inside Hogwarts itself, you can quit and exit back to The Leaky Cauldron super-hub level, where you can purchase the unlockables you found in the game, as well as replay the story levels in "Free Play" mode.

In Free Play mode, you can select whomever you've unlocked so far to play as then start the level, after which the game will automatically assign you extra unlocked characters that you can switch to at any time during the level by pressing LB or RB. The characters the game assigns will always be the ones you need to beat the level and (assuming you have them) the ones you need to find all the collectibles and unlockables.

More of the same here; in between levels you'll be able to learn more spells such as Immobulus, which will finally let you kill the blue Pixies, and the Polyjuice Potion, which will let you put ingredients inside the gold pots you've seen here and there to make a potion that lets you switch your character with any character you've unlocked and purchased at The Leaky Cauldron.

The Polyjuice Potion is especially useful as it is the only way to play as other characters in Hogwarts and The Leaky Cauldron hub worlds (the hubs otherwise do not have a Free Play mode). You cannot carry your changed forms into story levels though.

This series of story levels will see you unlocking two major spells. One of them is "Riddikulus", which will let you destroy the rattling Boggart Trunks you see throughout Hogwarts and other story levels. The Boggart Trunks in Hogwarts are especially important as they drop keys that will let you unlock the green locks in Hogwarts, allowing you access to new areas such as the Clock Tower and the Owlery.

The other spell is "Expecto Patronum", aka Patronus. This spell is the only one that can kill the dangerous Dementor enemies (as well as defeat Boggarts). Harry will be the only one of the main three characters that can use it, in lieu of Riddikulus.

Also, soon enough into Year 3, Ron will lose the use of Scabbers, at least for Story Mode (Scabbers can still be used in Free Play). Replacing Scabbers is Hermione's cat, "Crookshanks", whom functions the same way except has the added advantage of being a "Digger" character, i.e. can interact with Dig Points.

The last year will see you learning some important stuff. One is the Aging Potion, the last potion you can learn in the game, which will let anyone that does not have Aged status cross the Age Lines, some of which block access to a few sections of Hogwarts (though just using an Aged character also works).

But the real important ability to learn is Reducto, the most valuable spell in the game. This spell lets you destroy any object made of steel. It's the only way to reach some major areas of Hogwarts, and the only way to get your earliest Dark Mage characters from Free Play mode (most Dark Mage characters require that you use Dark Magic to get).

While not necessary towards beating the story mode, getting a Dark Mage character gives you access to Crucio, which is the only way to destroy any black or red colored object emitting red sparks. Crucio and Reducto are a huge part of finding all the unlockables in the game.

By the end of Year 4, you should have access to every room in Hogwarts, including any area that requires Crucio or Reducto to access, as well as Dumbledore's Office in the Great Stairwell, of which you can only enter after beating the game.

Walkthrough

1. May as well play as Hagrid if you can as the magic-less Harry will be mostly useless for now. Run to the exit door and blow up the keg on the shiny floor.
2. Have Harry stand on the shiny floor and then have Hagrid use Wingardium Leviosa to raise the floor up.
3. Have Harry run up the stairs he's raised up to, grab the crank, attach it to the exit door, and levitate it to open the way out.
4. Outside, use Wingardium Leviosa to levitate the blocks on the ground into the wall, making it move aside. You may now enter Diagon Alley itself.
5. Run to the end of the alley to find a roadblock and a cauldron blocking your way. This will be the first of many times you will be searching for three ingredients to feed the cauldron (in this case, to blow it up and the roadblock with it).
6. Start by grabbing the flowers off of the table nearby. Dump them into the cauldron. Note that it, like all ingredients, glow brightly and can be picked up and carried.
7. Levitate the ice cream vendor's cart next to the cauldron and it will drop another ingredient. Dump it into the cauldron.
8. Grab the red spider off the nearby web and dump it in as well. It will explode and take out the road block.
9. Have Hagrid yank on the pull chain ahead; only characters with Superstrength can pull them. This will open the way into Gringotts.
10. Inside Gringotts, you eventually want to walk up to the Interaction Point as Hagrid and press B. Griphook will join your group afterward; he can unlock safes and other locks. NOTE: If you are on Free Play, you will need to select him using the LB/RB buttons after recruiting him to make him appear.
11. Have Griphook unlock the gate using the Interaction Point, then have Hagrid use the pull chain. Levitate the parts that fall out of the safe into a painting and use the Interaction Point that appears.
12. Walk towards the cart you see inside the secret room that opens. You get a cutscene and then will end up at the vaults.
13. Go left from where you start and have Hagrid use the pull chain to move the dragon, then have Griphook open the lock. Enter the vault to get a cutscene and then be sent outside.

Collectibles

1. House Crest #1: Inside The Leaky Cauldron, use Wingardium Leviosa on the two candlewicks by the bar, then levitate the remains of the tables they blow up into portaits, then finally use the same spell on the nearby chairs to jump to the floating crest.
2. House Crest #2: Simple; once you enter Diagon Alley, walk over to the Interaction Point with any character and press B to get the easiest crest in the game.
3. House Crest #3: After blowing up the green cauldron, it leaves behind green goop on the ground outside Gringotts. Find a barrel and levitate it to make it dump LEGO parts. Levitate the parts to create some sort of broom-powered vehicle. Ride it over the green gunk to clean it up and receive a crest for your trouble.
4. House Crest #4: Inside the lobby at Gringotts, use Reducto to blast the lock on the gate behind Griphook, then have Hagrid yank the pull chain beyond it.
5. Gold Brick #1: Beat the level.
6. Gold Brick #2: Get True Wizard at 22000 Studs
7. Gold Brick #3: Find all four House Crests.
8. Gold Brick #4: Rescue the Student in Peril.
9. Student in Peril: In Diagon Alley, have one partner stand on the sparkling brown patio table closer on the right-hand side of the street from the entrance to The Leaky Cauldron, and have another use Wingardium Leviosa to raise the table up to the Student.
10. Mr. Olliander: After Griphook opens the gate, go left and blast the steel lock on the chest there with Reducto, then shoot the chest.
11. Tom the Innkeeper: After Griphook opens the gate, go right and blast the steel lock with Reducto on the chest next to the ride-able cart. Blast the chest open.
12. Griphook: Right next to you when you enter the vaults; just shoot the steel lock off the chest using Reducto and shoot the chest open.

Wingardum Leviosa

1. You start with Ron and Harry. Explore the Gryffindor Dorm if you wish, then exit into the Gryffindor Common Room.
2. Hermione will join the group in the common room. Approach the exit and a strange dresser will run around eating up pants on the ground and blocking the exit.
3. Shoot the painting of the red-robed wizard next to the mad Wardrobe. His pants will fall off, distracting the dresser and allowing you to pass.
4. In the House Hall area ahead, follow the ghost that leaves behind ghost LEGO studs down the stairs.
5. The ghost leads you into the Great Stairwell. Go up the stairs, ignoring the ghost studs for now. Have Ron bring out Scabbers (press B), and guide Scabbers into the tube so that he rams the bell at the other end.
6. Go back down the stairs and you will now see an Interaction Point. Use it to move the staircase; follow the ghost stud trail now that you can.
7. In the next room, the Lobby, explore if you wish, then take the exit to the left-hand side. Follow the ghost stud trail in the next room into Prof. Flitwick's classroom.
8. After the cutscene, you will have Wingardium Leviosa. You will have to unlock it for good though by rescuing three Students in the classroom (they do not seem to count towards your Students In Peril totals).
9. First student is simple; right after the cutscene and learning Wingardium Leviosa, just use the spell on the nearby crane holding the heavy weight.
10. Go to the left afterward and look for two giant LEGO pieces. Use Wingardium Leviosa to make a set of steps that will let you jump up to the second floor.
11. Next, shoot the manacled man in the painting by the second Student hanging from the chandelier, then use Wingardium Leviosa on the resulting bits, then again on the weight to rescue the student.
12. For the last Student, use Wingardium on the knight suit's torso and drop it on the knight's "legs" on the pedestal. Next, drop the knight's helmet on the torso, then float its halberd over to it. Finally, use Wingardium Leviosa on the heavy weight; the knight will use his halberd to keep the weight up.
13. Exit Flitwick's classroom and follow the ghost to the room with the gate underneath the walkway above. Use Wingardium Leviosa on the big LEGO blocks to build the tower depicted in the painting to the left of the gate. When all three are built, the path will open.
14. Climb the stairs in the next room and shoot the bookshelf nearby George and Fred Weasly, then use Wingardium Leviosa on the resulting parts to unlock the exit. Take it to start "Out of the Dungeon".

Walkthrough

1. You are controlling Ron and Harry. Follow the blue troll in the first section. The first thing he does is wreck some pipes, leaking toxic gas.
2. Send Scabbers into the piping and have him shut down the toxic gas by bumping the valves inside.
3. Follow the blue troll; he will wreck a statue, causing a giant globe to fall and block the path. First use the nearby big LEGO blocks to climb onto the bookshelf near the fountain.
4. Next, follow the walkway above, jumping over the gap above the fountain to the torch by the gold knight. Use Wingardium Leviosa on the torch, causing the gold knight to cause some damage to the environment.
5. Levitate the resulting pieces to create a harpoon, then levitate the harpoon into the hands of the nearby giant statue and it will knock the globe away.
6. Finally, you'll need a disguise to get past the exit door. Use Wingardium Leviosa on the lamp above the painting past the statue that knocked the globe aside.
7. Shoot the painting afterward and it will turn your character into a woman. While a woman, use the Interaction Point by the door to open it.
8. In the next room, you will take on the troll. It will smash the bathroom stalls; after it does, levitate the wreckage into its head to damage it.
9. It will respond by batting junk at Harry and Ron; levitate the junk it launches right back into it for more damage.
10. Afterward, it will stand there stunned, dropping its club. Use Wingardium Leviosa to levitate the club above its head, then release in mid-air to send it tumbling onto the creature's head; this will finish the job (you may need to try this a couple times due to iffy hit detection).

Collectibles

1. House Crest #1: In front of the fountain in the first section are three flopping fish out of water. Levitate them into the fountain.
2. House Crest #2: In the first section, there are nine empty plant pots; zap all nine for the House Crest. They are mostly easy to spot save for the last one, located to the right of the exit door (you'll need to adjust the camera to spot it).
3. House Crest #3: The level has seven wall crucibles you must light using Wingardium Leviosa. There are four in the first section and three in the bathroom where you fight the troll.
4. House Crest #4: You need Reducto to shoot the steel lock on the valve in front of the fountain. Once that's done, levitate the valve to turn on the waterworks; ride it to the crest.
5. Gold Brick #1: Beat the level.
6. Gold Brick #2: Get True Wizard at 48000 Studs
7. Gold Brick #3: Find all four House Crests.
8. Gold Brick #4: Rescue the Student in Peril
9. Student In Peril: After the troll smashes the bathroom stalls, it will reveal a Student that's just standing there among the wreckage; touch her to rescue her.
10. Ron (Girl Disguise): Right at the start, have Hermione or any Bookworm character open the Magic Bookcase.
11. Harry (Hogwarts): Before going into the woman's bathroom, blast the steel lock on the desk with Reducto, then shoot the desk open.
12. Madam Malkin: Inside the woman's bathroom, blast the steel lock on the green lockers to the left with Reducto, then shoot the middle locker and use the footstool that pops out to jump up to it.

Lumos

1. You'll be back at Hogwarts and ready to unlock the next spell. Go back to the hall where Prof. Flitwick's classroom was (where you learned Wingardium Leviosa).
2. Once there, you will find another door open; enter it.
3. Inside, you be granted the Lumos spell. As before you will need to complete a task to permanently unlock it. Press B to start the spell, which creates a light source from your wand.
4. On the bottom floor, find three gold triangle LEGO pieces and pick them up. Carry them to the star-shaped object in the center of the room and set them in place.
5. Use the giant LEGO blocks to jump to the second floor. Up there, use the Lumos spell to drive off the tentacles guarding the triangle pieces; collect them and set them in place.

Strength Potion

1. Now that you have Lumos, exit the classroom. Follow the ghost to the next area.
2. The ghost leads past a set of green tentacles; move them aside with Lumos, then again with the tentacles blocking the way to Snape's classroom.
3. Enter Snape's classroom; you must now unlock the Strength Potion by finding three ingredients.
4. First, use Wingardium Leviosa on the coiled snake on the nearby column. It will slither down and you can take the ingredient out of its mouth.
5. Next, find a gold wall to the left of the snake and use Wingardium Leviosa to move aside the bricks, then levitate the skeleton inside till he coughs up the ingredient.
6. Finally, use Wingardium Leviosa on the pile of LEGO parts to make a ramp for Scabbers to climb into a tube. Follow the tube to a bowling ball and push it to knock down the ingredient.
7. Feed all three ingredients into the cauldron and it will become a Strength Potion. Drink it with the B Button and, while under the effect, pull on the nearby chain to unlock the potion for good.

Lumos Solem

1. Exit the classroom and follow the ghost to the next area. You will need, if you haven't done so already, to levitate the box on the ledge by the lion's head, feeding the lion's head and opening a secret passage that leads into Hogwart's courtyard.
2. Inside the courtyard, use Lumos on the plants blocking the way out to the left. Follow the ghost in the next area into Prof. Sprout's greenhouse.
3. After the cutscene, you will notice that Lumos has been replaced with Lumos Solem, which lets you kill the Devil's Snare plants you've seen around Hogwarts. You'll need to rescue Ron with it, but he's blocked off by a giant web of vines.
4. Go to the back of the class and destroy the objects on the left and the piping on the right. Once they are all in pieces, levitate them into a wagon.
5. Ride the wagon into the vines to smash them, then shoot the Devil's Snare holding Ron with Lumos Solem. You'll have unlocked the spell for good.

Broomstick Riding

1. With that done, exit the greenhouse and follow the ghost to the nearby broomstick yard.
2. Have Harry ride one of the broomsticks; Ron can't gain altitude and Hermione is useless on a broomstick. Hold A to rise altitude and B to lower altitude.
3. Fly up and shoot the gargoyle holding the crystal ball. He will hand it off to his buddy; chase him around the yard and shoot him three times.
4. The second gargoyle will then feed him to a plant on the wall; shoot the three giant flowers around the plant to end this mini-game and unlock Broomstick Riding.
5. Follow the ghost to the next area. He will lead into the secret passage near the courtyard through some vines; use Lumos to move those vines aside.
6. The ghost leads you into a small garden and disappears behind a boarded-up wall. First, destroy the Devil's Snares in this area, afterward, use Wingardium Leviosa to assemble the LEGOs in the center into a ball-like device.
7. Next, shoot all of the LEGO bushes in the four corners of the garden; three of them will cough up ingredients.
8. Toss the ingredients into the nearby cauldron. It will become a Strength Potion. Drink it and pull the chain by the ball-like device; it will blow open the boarded-up passage.
9. The ghost will now lead you across a broken covered bridge. Use the nearby broomsticks to cross the gap, then use Wingardium Leviosa to repair the bridge to bring your partners along.
10. The next area is a knoll outside Hagrid's Hut. Keep following the ghost and he will lead you to the area outside the Quidditch Pitch. Enter the tent there to finally begin the next level.