2500 M is the sixth subchapter of Chapter 7: The Summit in Celeste. The subchapter brings back the mechanics of Chapter 5 and utilizes them in new ways. In the final room of the subchapter, Madeline and Badeline will talk to each other while being boosted up from the last purple orb, then combine back together to enter the next subchapter.
Gameplay[]
Although there are no Seekers or related objects to them here, this subchapter can still be a bit tricky. Most notably, some swap block sections can be quite hard to figure out, especially with having the ability to dash twice in the air. A few rooms in, a path will split and progression forward will be blocked by a lock. The key to unlock it is in the room above, but in order to reach it, the player must ride a red bubble from below up to it. The room right after the lock has a secret entrance to a path above with much harder rooms, but this is mostly just for Strawberries. The final room of the subchapter is quite long and will need a lot of back-and-forth movement upward while using momentum from swap blocks.
The pearl piece of the Crystal Heart of this chapter can be accessed by first going left of the first room of the subchapter. There's a smashable wall leading to another room (which can also easily be entered just by riding the red bubble to the left) and this room has a Strawberry. There's also a red bubble in that room, and by taking it right, Madeline will be able to travel above all of the first and second room of the subchapter. Go up from the second room of the subchapter beyond the disappearing platform to be taken to another room which is filled with crystals and dash crystals with some red bubbles and swap blocks as well. At the right end of this room, the pearl piece is found and the after going right of it, the player arrives in the room above the lock room.
Strawberries[]
There are 8 Strawberries found in this subchapter.
Berry 1
By riding the first red bubble of the subchapter left (or just dashing into the smashable wall it breaks) a room with a Strawberry is reached. This berry will seem very out of reach, but it is possible. Stand on the bridge above and dash into the floor, then quickly run off the bridge and land in the red bubble. Take the red bubble left and, as soon as you reach the wall, jump right and grab the swap block. Let go right as it arrives back on the top and you'll be flung into the air. With both of your dashes in the section above, you can dash to the left and get the berry, then dash back to the right and claim it.
Berry 2
Found in the first room of the subchapter, this Strawberry is found in the middle of the room under the usual red bubble path. Dash straight down into the gap of the spikes when passing it in the red bubble, then dash diagonally up-right to land on the disappearing platform. Jump up and do an upward, then diagonally up-right dash out of the area to another disappearing platform, then dash to get into the nearby red bubble.
Berry 3
This berry is found in the same room as the key above the fifth room of the subchapter, just on the left side instead of the right. To get it, just take the red bubble path two rooms below on the left to get to the Strawberry's location.
Berry 4
At the start of the sixth room of the subchapter, ride the first red bubble straight up to reveal a hidden path above. This Strawberry is found at the end of the first room you enter above a disappearing platform. First, you should make your way to the spring on the right and try to grab the wall above it. When the swap block is about halfway back to its original position, bounce on the spring and hold onto the swap block. From there, you can dash to the berry.
Berry 5
After finishing the room of the previous Strawberry's location, two more rooms have to be completed after it. For the first room after, careful timing by jumping and dashing up into dash switches while avoiding blades, then doing it again but with springs. In the second room after, the Strawberry is located at the end. The first challenge in the room just has you dashing on a swap block and launching yourself forward by jumping right after. Then, you'll need some careful dash timing around some blades and you can reach the berry at the end.
Berry 6
Found in the twelfth room of the subchapter, this Strawberry is located in a hidden area near the middle of the room. Below the swap block which is meant to launch you up to the last two swap blocks, a hidden passage is revealed by entering from the left side.
Berry 7
Right by the red bubble which you ride up into the purple orb, a few secretive areas are located. To the top-left of the red bubble, a dash switch is found. To the top-right of the red bubble, a temple gate which opens from that dash switch is seen and it protects another dash switch. To the bottom-right of the red bubble, this Strawberry is found behind a temple gate which the top-right dash switch unlocks.
Berry 8
To the bottom-left of the red bubble at the end of the twelfth room of the subchapter, the wall will reveal a hidden section with this Strawberry.
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