Celeste

The cassette to unlock these levels can be found in Chapter 2 immediately after acquiring the ability to dash through dream blocks, and after that you can access them any time from the map. I recorded a quick walkthrough of both the cassette and the B-Side:


Timestamps are in the description, and I've also included a couple tips to make some of the moves make a bit more sense

Since this will be your first B-Side, I'll do some explaining
The B-Sides are unlocked after finding the cassette in the A-Side, or normal version, of their given level. So, for the B-Side of Chapter 2, you'll find the cassette out the bottom of the large central room in Section 1. Dash through the block in the ground to find the cassette room. After collecting the cassette and finishing the level, you'll get your rundown of strawberries collected and total deaths, plus the unlock for the B-Side.

B-Sides are more difficult version of the given chapter, with the same theme and mechanics of the level, just turned up to 11. The sections are roughly the same length as their A-Side counterparts as well. Every B-Side ends with an alternating pink and blue platforming section with their Crystal Heart at the very end. Plus, they have a bangin' alternate version of the level's theme song. That should be everything, so let's get into it. I'll break each section down into their own parts so they're easily identifiable.

Section One

• You won't need to go through the beginning section like in the normal level. Instead, you'll get right into the action. You'll need to jump across the gap and dash upward through the black block and hold right to avoid the single spike on the wall below. Grab onto the right side of the small wall and jump, then dash up through the next black block and fall back down to the right to dash through the final black block of this screen, which spits you out onto the next screen.

• The crow will suggest you press and . What you need to do is press the direction you want to go and press as you come out of the black block to get a boosted jump in the direction you press. Dash through and jump out of the black block to reach the second one, then dash up through the ceiling.

• You'll do the same black block jump through two small blocks this time, with a dash at the end to avoid the spikes along the ground. Climb up through the ceiling for the next room.

• You'll do the black block jump through the first block to reach a gem in the distance, then repeat it to reach the last black block that you'll dash up through to climb through the ceiling.

• Dash and jump through the first two black blocks, aiming to grab onto the incoming wall after the second block. Climb it and jump over to the other side, then jump and dash up to avoid the spikes ahead and grab onto the small wall overhead. Jump over and bounce off the wall to get the gem and refill your dash and stamina. Climb the other wall and transfer to its other side, then jump and dash and jump through the black block to reach the end, where you'll dash up and climb up through the ceiling and enter the next section.

Section Two

• This is the Badeline section, and you'll be chased by her throughout each screen. Dash across both lower black blocks and jump to the small wall on the right. Dash up to the blue gem and fall back down, avoiding Badeline. Dash through the first black block and dash up through the vertical block for the blue gem above. Dash diagonally through that block to get back down, then dash through the block to start climbing up the last vertical shaft for the last blue gem. Fall down to avoid Badeline, then climb up the previously blocked path to go through the ceiling.

• Dash up through the block, then dash through the block ahead to land on the long block. Dash down-right through it and dash into the green gem, then dash up through the block. Dash up-right to clear the spikes underneath, then hand just right of the wall to fall down to the green gem, where you'll grab the wall just after. Climb up to the block and dash through to reach the end of this room and climb through the ceiling.

• Dash and jump through the small block to fly across the spike-filled room, then dash up to a small wall. Jump off of it to fall through the small gap with the green gem, then dash left to grab onto a wall ahead. Climb up by wall bouncing to reach another green gem, then jump to it and dash through the block and hold and to automatically grab onto the block as you come out. Slide down and jump across, dashing up-right to reach the far wall and climb through the ceiling.

• This room has five blue gems to collect. Dash up-right through the block and walk left to collect the first gem. Dash down-left for the second gem, then dash across the block for the third gem. Dash down from there for the fourth gem, then quickly double back and dash up-right for the final gem. Dash up-left to be in the upper portion of the room, then stand right next to the gem and dash down-right to reach the end of the room and exit right.

• Dash and jump through the first block, then climb up for the first gem. Fall down onto the jump pad and bounce up to the second gem, then dash and jump through the second block. Dash up through the third block and hold left to reach the fourth block, which you'll dash through and hold left to fall onto the last gem. Dash right as you collect it to grab onto the now moving block that takes you to the far wall. Climb through the ceiling to enter the next section.

Section Three

• Use the jump pad and dash up through the block. Dash down through it on the other side of the wall, then dash right to land on the next jump pad, where you'll need to hold right to avoid the overhead spikes. Dash up through the block and bounce off the wall to clear the spikes and grab onto the right side of the wall below. Slide down and jump to dash up through the block, the climb up through the ceiling.

• Dash up through the two blocks and grab onto the next block. You'll need to dash though it and immediately dash down to avoid the spikes against the next wall. Grab the wall below and jump to the next gem, dash up-right through the block, then dash down-right and jump through the next block to reach the opposite wall. Climb up and dash up-left through the last block to reach the last wall. Dash up-right to climb through the ceiling.

• Dash up through the block and hold right to avoid the spikes below. Grab onto the right side of the wall below, then jump and dash up through the block overhead, holding right to fall between the two spiked walls. Grab the small wall below, then do it again, this time dashing right through a block, then immediately dashing left again to go back through that block and grabbing onto the opposite side. Jump up and dash through the block overhead, then dash right and jump out of the block to clear the spikes ahead. Follow the gap down to the left and dash through the last block to exit right out of this room.

• Dash up through the block for the first blue gem and fall down the right side to dash and jump through the block to reach the back wall. Climb up and jump to get the second blue gem, then fall down to grab onto the lower wall. Dash through the block, then jump and dash through the block to get the final blue gem. Jump and dash up-right through the block to grab onto the right side of the new wall, then jump and dash to the opposite wall and climb up through the ceiling.

• Use the jump pad and dash and jump through the block to reach the opposite wall. Climb up and dash and jump through the block again. Do that two more times and dash up to reach the blue gem and a green gem. Slide down and dash through the block to grab onto the new wall, then dash up-left through the block and grab onto the opposite side. Slide down and dash through the block, then dash across the gap and climb up to the green gem. Jump into it and dash up-left through the block, then grab onto the block as you come out. Slide down and dash and jump through the block for the last time to come out the other side and climb through the ceiling to come to the final screen.

• Wait for the blocks to be dark to jump up and dash into the first gem. Dash up again to get even more height, then wall bounce off the platforms to reach the second gem, where you'll likely run out of walls to bounce off of. Dash up into the final gem, then again into the crystal heart to complete the level.

Timestamps: 28:44 & 35:16

Celeste Chapter 2 "Old Site" B-Side Gameplay Walkthrough.