Rooftop is the fourth and final subchapter of Chapter 3: Celestial Resort B-Side in Celeste. The subchapter takes the player to the rooftop of the resort where Mr. Oshiro will be constantly chasing at them from the left side of the screen. The red Crystal Heart to complete the B-Side can be found in this subchapter.
Gameplay[]
After the players breaks their way onto the rooftop of the hotel, they'll go through the same type of chase sequence seen at the end of Chapter 3's A-Side where Mr. Oshiro will wait at the left side and then charge to the right to potentially kill the player. Mr. Oshiro is noticeably faster here than he was in the A-Side, spending much less time waiting on the left side before charging again.
Strategies[]
Room 1
A small, cramped room with some sludges on the right side and a smashable wall on the ceiling. Break through this smashable wall and climb up the corridor to make it on top of the hotel and begin the chase.
Room 2
This room will require good wall jumps to ensure you don't run out of stamina at a bad time, so start by dashing diagonally up-right over the dust bunnies to reach the pillar on the right, then wall jump left and then back right. At this point you should grab onto the wall and wait for when Mr. Oshiro is about to pass, then jump up and go over to the right after he passed by to then fall into the dash crystal which should immediately be used to dash straight to the right and grab the wall. From here, start climbing up and jumping up the gaps. If your stamina is in a pinch, you may need to aim for landing on Mr. Oshiro's head to refresh it. Jump over to the right side of this pillar and do a wall jump off the right side down below to reach the dash crystal. Dash diagonally up-right and wait on this wall until Mr. Oshiro passes by, which is when you should jump up and to the right side where you'll then do a wall jump to make it over to the next pillar. You can then jump to the right of this pillar where a spring can be located, and from there play safely to get past the last pillar without Mr. Oshiro crashing into you.
Room 3
There will be dust bunnies right above your head for most of this room giving a very claustrophobic environment which gives Mr. Oshiro an easy route to hit you. Wait on top of the first ledge for Mr. Oshiro to charge, then dash straight up to avoid him. Then walk right and duck when the moving sludge is coming at you, then dash diagonally up-right for a quick escape. If need be, go into the small dip in the floor when Mr. Oshiro does his next charge and duck to avoid him, and after he passes by quickly start running and dashing to the right. Get to where there's a hole above you and dash straight up there when Mr. Oshiro is charging at you in order to avoid him. After that, try to dash to the right before the moving sludge closest to you moves down and beat the cycle so that you can dash continuously to the end of the room before Mr. Oshiro has a chance to attack. If this isn't possible, there's another gap above you not too far after that can be used as a safety net.
Room 4
Jump and then dash straight right to land on the spring, then dash straight right again. For consistency, grab onto the right side of the platform on the left and wait until Mr. Oshiro passes to jump up. After that, touch the first dash crystal and dash up-right into the other one, then dash straight right through the gap to reach the end of the room.
Room 5
The cycle in which you begin this room can drastically affect how it's played out, and it's hard to keep track of the cycle after a death. Start by baiting Mr. Oshiro into a charge and dash over his head, then dash into the first dash crystal and continue dashing straight right about three times. From here, play it safe by only doing diagonal up-right dashes into the following dash crystals to potentially get around the circling sludges as well as dodge Mr. Oshiro when he attacks again. When the coast is clear, use your judgement to dash straight right as many times as needed to reach the end of the room.
Room 6
In this room you'll need to be careful as sludge-spawning tiles will be everywhere and stamina will be tight. Start by walking right and then jump up and wall jump for a bit, making sure Mr. Oshiro passes below you. Do either a straight up or up-right dash to grab the key token above and swerve to the right so that you can climb up the right side of the second floating platform. From here, jump to the right when Mr. Oshiro is about to reach you and keep going right to collect the dash crystal above the sludge. Fall until you reach the next key token then dash to the right and start climbing the wall. Jump over to the right side of the wall and, at the top of it, jump again to the right to reach a dash crystal, then fall to the last key token and dash straight right. After this, the key-activated platform will move out of the way and you can enter the opened hole.
Room 7
This will be the cassette block room of the chapter. Jump and dash straight right into the gap when the cassette blocks turn to blue and use your dash restored by the dash crystal to land on the pink cassette block with a spring on it. With your bounce, dash straight up into a key token above, then fall down to the key token below and grab the wall. Wait until the pink block appears again to jump onto it and bounce up. Dash diagonally up-right for another key token and land on top of the ledge. When the blue block appears, jump to it and dash straight up after bouncing on it for the last key token, then grab the right side of the ledge as you fall. Wait there until you can jump to the blue block again and bounce on it, then wait a short bit before dashing diagonally up-right to get to the Crystal Heart's section where you can win the level.