Somewhat related to this thread: https://www.lexaloffle.com/bbs/?tid=156363

Sandboxed carts can't kill their own processes. That is, code like the following doesn't work:

send_message(2, { event = "kill_process", proc_id = my_other_pid })

Presumably this is because sandboxed processes are (understandably) not allowed to send messages to pm.

This is a problem for things like multi-window carts, or carts that need a worker process (they need to be able to terminate a potentially unresponsive child process, especially on exit).

Example can once again be seen in Window Pong. Focus the scoreboard window at the top and press Q. It should close all the windows but only closes itself.

Additionally, it seems that sandboxed processes can't send messages to each other if they're from the same cart but not parented to each other. So if you launch the cart twice from filenav, the two processes can't communicate.

RNDvaders 1K

Cart File | Forum Post |

	More cartridges by Heracleum

More Cartridges [View All]

 

RNDvaders 1K

by Heracleum

Cart #rndvaders1k-0 | 2026-09-20 | Code ▽ | Embed ▽ | No License

9

A Pico-8 game in 1024 compressed characters, created for Pico-1K Jam 2026 in 3 days.

Game Controls:

⬅️➡️ Move your cannon left/right
⭕️ [Z or C] Fire
❎ [X or V] Start a new game
[P or Enter] Pause Menu and options...

Pico-8 Edu source code here.

[ Continue Reading.. ]

Code Redstone v2.1.1

by The34673

Cart #yoyleite_ye-2 | 2026-09-20 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

5

Code Redstone is an unofficial fan-made game inspired by Minecraft.
Minecraft and Redstone are trademarks of Mojang Studios/Microsoft.
This project is not affiliated with, approved by, or endorsed by Mojang Studios or Microsoft.

^^^^^^^^^^^^^^^^^^^^^
mandatory legal stuff

IDK what to put here honestly

Oh actually i thought of one, don't be surprised when some attacks don't appear, its random

largely inspired by Just One Boss, go check it out!

Also if some cringe game website comes and steals it without credit i will disable embedding for everyone

Previews down here!
vvvvvvvvvvvvvvvvvvv

[ Continue Reading.. ]

necrotd

by Damobmafia

Cart #necrotd-6 | 2026-09-28 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

18

You are a powerful necromancer, and crusaders are coming for your keep!

Summon an undead army to kill them, harvest their blood, and survive...

HOW TO PLAY:

1. Kill crusaders, earn blood.
2. Spend blood to summon undead.
3. To make an undead stronger, sacrifice another undead to upgrade it. Which undead you sacrifice matters: each one grants a different grafted ability.
4. Rush the crusade to call the next wave early to earn extra blood.

CONTROLS:
D-Pad: moves the cursor.
❎: summon on open ground; manage an undead; confirm in menu.
🅾️: back / cancel. On open ground: offer to call the next wave early (press again to confirm).

[ Continue Reading.. ]

My entry to PICO-1k Jam 2026. (Link)

Postcart port (Postport?) of @austinmerrick's excellent little Circle Timer game: https://www.lexaloffle.com/bbs/?tid=48139

Press X to play/restart.

(300 chars)

k=63.5d=.01function
_update60()cls(7)c=circfill
camera(⧗\▥*(rnd(6)-3))⧗-=1c(k,k,53,0)c(k,k,40,7)for i=0,20do
p=█+i/180if(i>19)p=●
a=k+sin(p)*47b=k+cos(p)*47c(a,b,4-i\20*5)end
if btnp(5)do
if(➡️<1)run()
⧗=▥+8?"⁷x3d"
if(pget(a,b)>0)⬅️+=1█=rnd()➡️+=.03d*=-1else ➡️=0?"⁷ah"
end c(a,b,3,6)●-=➡️*d?⬅️,60,61,0
end

A 64×64 px demake of the UNxR logo reveal animation from my js13kGames 2026 entry
https://js13kgames.com/2026/games/unxr

(292 chars)

poke(0x5f2c,3)d=">0><><0<0<00O0O<A<A0A0O6^<^0^0l0l0l6l6h6h6j<^6h6S3Z9S9Z3"o=ord::_::cls()a=abs(t()%6-3)for j=mid(0,46*a-23,23)\1,0,-1do s=mid(0,2-a,1)*(1-j/46)for i=1,53,4do line(32+s*(o(d,i)-78),40+s*(o(d,i+1)-74),32+s*(o(d,i+2)-78),40+s*(o(d,i+3)-74),j<1and 7or j\3%8+8)end end flip()goto _

So I noticed that Picotron does weird things when you change the case of files. Is this a bug or am I doing something wrong? How to recreate: create a folder called "apps," put some stuff in it, then create a folder called "Apps", or rename "apps" to "Apps"

Ok, hear me out. What if there were a Picotron edition on the web? But unlike Pico-8-Edu, it would not be freely available (maybe there could be a demo version). It would work like this: you buy Picotron, and then you would be granted access to Picotron Web. If you do not own Picotron, you would get some sort of demo version similar to Pico-8-Edu.

Broomnastics

by klunkoplunko

Cart #kp_broomstick-2 | 2026-09-20 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

8

How long can you balance a broom on its end?

I recommend playing with a mouse (or touchscreen), but the arrow keys also work.

Or alternatively, just have fun swinging the broom around.

This is my entry for the PICO-1k Jam 2026! I made it in about 2 hours and it takes up only 974 compressed bytes. I'm pretty proud of it all things considered. Especially the fact I managed to sneak some music in there with some memory shenanigans. My personal best is 31 seconds.

[ Continue Reading.. ]

jetpack with water!

Folks, we are not terribly far away from my next playtest version for Death Angel!
This will mark the game entering Alpha. I will have 4 out of 5 stages playable and LOTS of changes and improvements.

To celebrate I'd like to host an event on my discord on the release day of the new version!
We can stream our gameplay and compete for score!
Not sure of details yet, but I hope to have some prizing and a Q&A for fans.

Stay posted!

discord: https://discord.gg/Vrp4XuPZvR