A Portal demake disguised as a Celeste Classic mod.

Note: This is not a demo, if anything were to make you think so. 👀


E + S + D + F - Move
Left Mouse Button - Fire Blue Portal
Right Mouse Button - Fire Orange Portal
A or Middle Mouse Button - Clear Portals

by Kris De Asis and Lord SNEK

Music by RubyRed

A mod of Celeste Classic
by Maddy Thorson
and Noel Berry

💬 Celeste Classic Discord

PlatformsWindows, macOS, Linux, HTML5
Rated 4.8 out of 5 stars
(32 total ratings)
GenrePlatformer, Adventure
Tags2D, penguins, Puzzle-Platformer


Standalone (Linux) 702 kB
Standalone (Mac) 3 MB
Standalone (Win) 1 MB
Cartridge (PICO-8) 42 kB


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how do you beat this?

huh, cool! thanks!


I'm going to be 100 with you. Make the default controls wasd

The current controls are a PICO-8 limitation.

This is so good. Combo of two stellar games, and it has the best parts of both of them. Reminds me of Portal 2D a lot.


it's 'pc gamer'

Why sdfe? You have fried the wires in my brain.

The game was made with PICO-8, those are just the buttons the console uses.


i cant play on my chromebook

maybe if you make a hotkey to switch portals that would be better for devices that arent mouse accesible

Right click on chromebook by clicking with two fingers at once

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how does the confrontation level work? I'm stuck.

You have to escort the shiny object to the character who normally uses said object :)


Nah the shiny thing's at the bottom left

well, I figured out how to open the door but I don't know how to get back to the door.


wow very nice


can you include the Pico 8 cart image

The cart's available on the PICO-8 BBS here, but I'll add it to the downloads too :)



yay I did it!


i love the Reconstructing Science demake in the begining


I love everything about this.


shows that everything is better with portals! impressive feat


Hiii, I've made a video about the game and wanted to share some feedback about it with you, hopefully it is useful to you ^^

-The concept of the game is really good and interesting.

-I loved the gameplay mechanics, they are really well implemented with the level design.

-The visual style is really well done and fits perfectly the theme of the game :)

-You really nailed the "portal" vibes ^^

Hopefully this is useful to you :D, also if you could subscribe that would help me a lot :)


I played the web version And i couldn't move at any time the poratls work but i couldn't move

Have you tried playing the web version in full screen? The middle mouse button on web would enter scrolling mode and eat your inputs, but works when in full screen (or in the standalones).


thank you that fixed the issue its a great game


really nice work! I reached the penguin sign, and now I’m suddenly considering what sort of speedrun possibilities that tech opens up…


If you reach the summit with 6/6 of the cores, there might be something with that sign. ;)



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I admitted defeat at the double-door-single-cube puzzle. Very impressive, though. I did encounter one bug that killed me when passing through a portal just behind a cube I pushed through when the portal was up on a wall. Maybe I ended up between it and the wall as we fell, and it crushed me? Happened more than once at the same spot.

I also second the need for clearer exits.


a nice little game! i really enjoyed my time. I would have liked wasd and jumping with space a bit more.

Well done - you could have totally moved away from Celeste and stick more to the Portal look, but good job anyway.

Couple of comments: 

- ESDF + mouse works well - slightly awkward for jumping precisely 

- as other pointed, the portal physic appears to be broken when you move into a portal (e.g the player will instantly go "back"). 2d makes it impossible (unless you flip the screen when getting out of a portal to keep momentum and keyboard aligned!!)

- music is a bit "depressing" (?) RubyRed I know you can do better :]

Thanks for the feedback! :D

Staying close to Celeste was an artifact from this starting out as some high effort joke where I snuck a portal gun into Celeste Classic, and with all the people helping out being from that game's community. It gets somewhat tied with the Celeste Classic lore eventually to somewhat justify the theme. :P

I see what you mean about the physics- I couldn't find a very satisfactory solution and largely based it on this really old 2D Portal game made in Flash which controlled and behaved similarly. Perhaps some short frame window where controls are flipped upon exiting a portal?

The momentum seems to decrease when you enter a portal, so the basic mechanic is lost to me.

I got to a level with Companion Cubes and couldn't proceed. Also, I realised the levels need a clearly defined exit.

I`m pretty sure you need to go up at this part( with more momentum)

Yeah, I eventually figured that out. I was right about needing clearly defined exits.

the left mouse and right mouse buttons are switched by default. is there a way to fix this?

Have you tried the standalone versions? Otherwise it shouldn't affect things much if orange and blue portals are revered. :P


pooooog, nice demake. 8/10