Depths is the second subchapter of Chapter 5: Mirror Temple in Celeste. The subchapter starts with Madeline finding Theo inside of a mirror, with both being confused on how it happened. After continuing forward through the subchapter, the player will eventually come across a giant mirror which, after activating it by hitting 2 dash switches, will suck Madeline into a dream. There will then be a section where the player plays as a Seeker to kill Madeline in this dream and wake her up, ending the subchapter. Aside from informally introducing Seekers, red walls, and barriers via the Seeker dream, this subchapter also introduces yellow torches. The Crystal Heart of Chapter 5 and the Cassette to unlock Chapter 5's B-Side can both be obtained in this subchapter.
Gameplay[]
There will be many dark rooms in this subchapter where the player can hardly see beyond nearby Madeline until touching blue torches to see the path. A key is needed to advance further past a certain point in the subchapter which requires a long detour. However, using the method to get the Crystal Heart of the chapter, it can be ignored and it's possible to advance past the lock. This is particularly helpful in Golden Strawberry runs as it reduces risking death and also saves time.
After entering the mirror near the end of the subchapter, the player is put in control of a Seeker and has to traverse through a room to get back to Madeline and kill her with the Seeker. This does not count as an actual death in-game. The controls of the Seeker will be very slippery especially dashing into walls. Just like how Seekers normally work, the player as a Seeker can't get past barriers and will need to dash to destroy red walls.
The Crystal Heart of this chapter will be tricky to find as it requires you to use a key to unlock a lock found in the eleventh room of the subchapter. On the floor of this room is a smashable wall which unlock the path to the lock. However, you'll need to use a key on a lock earlier in the subchapter normally. By going to the ninth room of the subchapter early, a secret area is found by dashing straight up into the second floating platform after riding the red bubble to the left. This will give access to another red bubble, which you can take upward into a tunnel in the ceiling. By getting the key from the level normally, then going through this path, you can arrive at the ninth room of the subchapter with a key and unlock the lock which guards the Crystal Heart room.
The Cassette room is hidden deep into a streak of berry rooms which are found by going to the bottom-right transition of the fourth room of the subchapter. Go straight right from the first room you arrive in, then in the next room play through it to hit the dash switch and unlock the path further right. Next will be a Strawberry Seed room, but by going to the right there's a hidden passage which leads to the Cassette room.
Strawberries[]
There are 11 Strawberries found in this subchapter.
Berry 1
Above the left side of the first room of the subchapter is a hidden gap to another room. In this room, go to the red bubble and take it right to grab the Strawberry, then quickly dash straight down. Steer yourself slightly left and take the bottom red bubble left before dashing up to get to safety.
Berry 2
In the second room of the subchapter, a transition can be seen in the middle of the room on the floor. Stand on the swap block in this room, then dash and move right to launch yourself to the wall and climb it to reach the Strawberry.
Berry 3
By going to the left side of the second room of the subchapter above the entrance, you can find an area with some crystals and a swap block. Dash to this swap block, hold onto it, then jump up the corridor when you arrive at it. In the room you arrive in, go to the top-left. To get the Winged Strawberry in the next room, ride up the first two red bubbles to the ceiling then move left during your descent to reach the next one. For the third one, ride it left and make your way up the left area before dashing diagonally into the Winged Strawberry. Dash right as you fall, and you can easily make it out by riding the red bubbles up and dashing between them.
Berry 4
In the ceiling of the second room of the subchapter near the right you can find a gap to an upper room. It may be tricky, but you need to jump right from the ledge and dash right to hold onto the swap block and let go right as the other swap block returns to the left. From there, jump right and dash diagonally up-right to get above where the third swap block was, and you can climb up to where the Strawberry hovers.
Berry 5
Through another gap in the ceiling to the left of the one from the previous berry, this Strawberry is accessed.
Berry 6
By going to the top-left of the fourth room of the subchapter, there's a transition to another berry room. Jump and dash diagonally up-left to get to the red bubble and ride it left. Go to the next red bubble up-right and keep moving right after collecting the Strawberry. Dash into the next red bubble and take it right, then dash down before hitting the crystals.
Berry 7
By going to the top-right of the fourth room of the subchapter, another transition is found to a berry room. Ride the red bubble at the start to the right and, before hitting the crystals, dash diagonally up-right and grab the wall and the dash crystal. Jump off the wall and dash again diagonally up-right, then climb this wall to reach the other red bubble. Direct it to the left and dash diagonally up-left before reaching the crystals. Land in the small gap on the floor where there are no crystals, and you can get back to the entrance.
Berry 8
At the bottom of the fourth room of the subchapter is a transition at the left side. Dash in place to activate the swap blocks and then quickly run to the left to fall into the gap in the floor. Jump to the left out of this gap when the swap blocks return to normal. Hold onto the swap block and dash to get the momentum to jump off and land where the Strawberry is.
Berry 9
By going to the right of the bottom of the fourth room of the subchapter, there are 2 gaps in the floor which both lead to the same room which has a berry. Walk off the platform and move towards the center to grab the middle wall. Jump above the wall to the other side and grab the wall again. Jump off the wall and dash into a red bubble to take you back to the start of the room.
Berry 10
Go 2 rooms right of the bottom of the fourth room of the subchapter and from there the top-right transition leads to a Strawberry. To reach it, dash to where the lower swap block is going to be and jump over the crystal as the swap block moves back. Do this again for the next swap block and then dash up on the right side to get to the transition.
Berry 11
Complete the steps for the previous berry but instead of heading for the top-left transition, go for the dash switch on the ceiling above the second swap block. This opens the temple gate on the right which leads to a seeded Strawberry. Dash directly up into the leftmost seed and climb up the wall. Then, jump off the wall and climb the swap block and jump above it to both grab the next seed and land on the spring. Then you can either move right from the spring and dash to the wall to climb to the last seed or boost yourself to the right by dashing from the swap block.
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