Ninth edition of Wrocław event that combines the spirit of demoscene with retrocomputing and gaming.

This party is an opportunity for meeting fellow fans of 8 and 16-bit computers that were popular in Poland in 80s and 90s (such as Amiga, Commodore, Atari or ZX Spectrum), and demosceners (those from the past, as well, as those still active).

When and Where?

Event is scheduled to take place on May 17-19th 2024 at CZASOPRZESTRZEŃ, Klub Łącznik, Tramwajowa 1-3, Wrocław, Poland.

Party place



  • Live music acts
  • Music played with the original retro hardware and instruments
  • more info



    • Dynablaster
    • Lotus
    • IK+

    • presentation of games crafted for and played on original hardware
    • more info


  • MSX

    • Amiga Tracked
    • Executable 32K
  • GFX

    • Amiga Pixel
    • Amiga Raytrace
    • Colorcycling
    • Executable 4K
  • WILD

    • Wild Demo

    • Intro
    • Amiga Demo
  • more info

Photo report from earlier edition

fot. kosma.moczek



  • Single day ticket for Friday events


  • Single midday ticket for gaming events.
  • Valid through Saturday until the DECRUNCH PARTY starts (scheduled at 18:00).


  • Kids upto 9 years enter DECRUNCH ARCADE Saturday event at no cost.
  • Valid through Saturday until the DECRUNCH PARTY starts (scheduled at 18:00).


  • full event pass
  • the only way to enter DECRUNCH PARTY demoscene competitions at the spot
  • right to vote in demoscene competitions
  • get it if you can't attend but wish to vote remotely


You get what you deserve:

  • lifetime fame
  • a T-shirt
  • credit with optional link a webpage



Friday, May 17th

  • 18:00 Doors open
  • 19:00 Boot block
  • 19:05 Demo show
  • 20:30 Performances


Saturday, May 18th

  • 14:00 - Game competitions
    • Dynablaster
    • Lotus
    • IK+
  • 17:00 - Game dev compo


Saturday, May 18th

  • Deadline:

    • 12:00 • msx entries
    • 13:00 • other entries
  • 18:00 • 1st compo block

    • Amiga Tracked Msx
    • Executable Msx
  • 20:00 • 2nd compo block

    • Amiga Pixel Gfx
    • Amiga Raytrace
    • Executable Gfx
    • Colorcycling
    • Wild Demo
  • 22:00 • 3rd compo block

    • Intro
    • Amiga Demo

Organizers reserve the righs to adjust compo list and rules (no gamechangers though).


Sunday, May 19th

  • 00:00 end of voting
  • 00:30 prize giving
  • 10:30 doors close


We love stock platform configurations. If you feel it's not enough for your requirements please check our non-stock configs. It's OK to use them in the compo, please describe your entry's non-standard platform in the nfo file.

Compo machines

Stock configurations


  • 1 MiB .5+.5
  • Kickstart 1.3
  • Agnus 8372A
  • Denise 8362


  • VIC 8565 (new)
  • SID 8580 (mark if 6581)
  • 1541, 1541-II, 1541U


  • ATARI 800XL
  • 64K RAM
  • Single POKEY


  • 1040STF or
  • 520STFM

ZX Spectrum

  • Sinclair ZX Spectrum+
  • 48K
  • AY


  • Amstrad CPC 464
  • Amstrad CPC 6128 w. 3.5" drive

Non-stock configurations

AMIGA 1200/060

  • Warp 1260
  • 060/50MHz
  • 64MB Fast RAM
  • Kickstart 3.2

AMIGA 1200/030

  • Blizzard 1230IV
  • 030/50MHz
  • 64MB Fast RAM
  • Kickstart 3.1


  • AMD Ryzen 3900x
  • 64GB RAM
  • GeForce RTX 3090

By 16-bit we understand external CPU data bus and specialized chipsets' of the platform bit size (i.e. MC68000 equipped Amiga 500 or Atari ST are still 16-bit).

You are free to deliver demo for different stock 8 and 16-bit platform configurations, however you are supposed to let us know in advance and deliver proper hardware, if we are not able to do it.


Floppy disk is a basic data carrier. All non-executable entries should fit into one 3.5" floppy disk, or one side of 5.25" one, depending of popularity of the floppy type on the platform. Executable entries can fit into more then one floppy disk, if rules don't state otherwise.


Following competitions are scheduled to take place at Decrunch 2024

Amiga Tracked Music

  • Platform: Amiga 500 1MiB (0.5+0.5 chip+slow)
  • Format: Amiga tracker (MOD, DB1.7, OctaMED, AHX etc, for less popular formats, please contact us)
  • Play time: 4 minutes max

Executable Music

  • Platform: any
  • Format: executable file (Amiga executable, PRG, XEX etc.)
  • Size limit: 32 KiB (32768 bytes)
  • Max precalc time: 30 sec.
  • Play time: 4 minutes max excluding precalc

Amiga Pixel Graphics

  • Original art only (no copy)
  • Proper pixel art
  • GFX Chipset: OCS/ECS
  • Format: IFF
  • Entries will be presented in Visage
  • Version without signature will be shown
  • Provide at least 4 genuine workstages.

Executable Graphics

  • Platform: any 8-16 bit
  • Format: executable file (Amiga executable, PRG, XEX etc.)
  • Size limit: 4 KiB (4096 bytes)
  • Max precalc time: 30 seconds

Amiga Colorcycled Graphics

  • Platform: Amiga
  • GFX Chipset: OCS/ECS
  • Format: IFF
  • Entries will be presented in Deluxe Paint IV
  • Provide at least 4 genuine workstages.

Amiga Raytraced Graphics

Following configs are valid

  • Platform: A500 1MB*
    *or any other classic Amiga with 680x0 CPU
  • Format: IFF
  • project files from software used (must be rendered on an actual Amiga)

Wild Demo

  • Platform: any
  • Any demo that does not fit given categories. If you're using any unusual hardware, you have to deliver it to present your entry.


  • Platform: 8-bit, Amiga, ATARI etc
  • Format: executable file (Amiga executable, PRG, XEX etc.)
  • Size limit: 256b, 1K, 4K … 64KiB - you name it
  • Play time: 8 minutes max

Amiga Demo

  • Play time: 8 minutes max
  • Platform: Amiga
  • Format: 3.5" floppy(ies) or equivalent ADF images
  • If an entry is AmigaDOS executable file, make sure the floppy is bootable

Other rules

Organizers reserve the rights to merge compos with insufficient number of entries or split them if there are more than one entry for certain platform. For example if there are at least three demos for Atari, C64, ZX Spectrum or Amstrad and it doesn't cannibalize already announced competition we will organize dedicated demo compo for given platform.

Laptops are allowed only for cross-development purposes.

Remote entries should be:

Deadline for remote entries is 17th May 2024 23:59.

One entry per single person in msx and gfx competitions. Same person is allowed to be featured as collaborator in other production in the compo.

AI-generated entries are not allowed in the any competition.

Preferred data carriers at the party are floppy disks adequate to the platforms.

We have following hardware available to improve entries' delivery and testing process:

  • 1541U2
  • GOTEK Cortex and HxC
  • PC2SIO + SIDE cart
  • divMMC Future
  • Mega Everdrive
  • Everdrive GB x3 + Supergameboy

Digitally delivered entries (no data carrier) should be submitted in ZIP archive with filename in the following template Archive should contain info.txt file, with the same information.

All entries must be created by delivering people or the group they represent. Entries that have already been presented at other parties or Internet are forbidden and will be disqualified.

GAME DEV competition


  • 8-bit and 16-bit platforms. All stock configurations listed in demoscene compos are valid for the game dev compo.

  • The game should be presented by one of its makers or a person designated by them.

  • Up to 10 minutes for presentation of a single entry.

  • Voting will take place during and after the presentation of submitted entries.

  • Demoparty and game dev compo participants are allowed to vote.

  • Deadline for entry submission: May 17th 2024 at 23:59.

  • Please submit your entries via email [email protected] or an upload form at website.

  • Please provide:

    • Floppy image or archive containing a game;
    • Info file (e.g. .nfo) containing information on credits, user's manual and hardware requirements;
    • At least two screenshots of the game;
    • A video clip showing the gameplay
  • Complete games or playable demo or work in progress versions are allowed.

  • Ports of games from other platforms are allowed.

  • If the game is a port it should be clearly stated.

  • All works including code or its fragments, audio and visuals of a submitted entry must be original and made by its authors. Games ported from other platforms may be inspired or modelled after originals, but none of its elements of original can be used directly in a ported product.

  • Use of game creation tools like SEUCK, SEUD, Backbone, Reality Game Creator and similar is strongly discouraged.

  • The team/makers of the game hold all IP rights. However, they have to agree to release competition entries as freeware, open-source/free software or any other public domain type of the license.

Frequently Asked Questions

What’s the difference between Decrunch and other retro gaming oriented events?

Decrunch is a party, which aims to integrate retro computing enthusiasts and promote creativity and entertainment that those, once popular machines still stimulate and deliver. The difference lies in convention of the event, which in two thirds is a regular demoscene party.

Where did the name come from?

It is a bit accidental result of brainstorming in a hurry in a search for the name that would represent the idea of the event. Name comes from “Decrunching” – a process of data decompression that was previously compressed with what we called “crunchers” back in the days. The process allowed for example to fit more data into a floppy disk, but obviously not only that. Usually, during decrunching process there were some color flickering effects or background color switching effects displayed on the screen.

Can my family acommpany me?

Yes, of course. However it is important to not leave kids without proper attention. Just be a responsible parent.

Please remember, that Saturday and Friday evening events are 18+ only, and no children are allowed on the premises.

Is there a parking spot available?

Yes, there are couple of parking spots available on the party premises. The number of spots is limited, so the sooner you arrive, the more likely is for them to be still available.

Is there any sleeping room or sleeping area available?

No, the party place is not fitted with any dedicated room or space for sleeping, however if noise and party activities do not bother you, you can unfold your sleeping bag in the party hall. If you’re planning to do that, beware of the following rules though:

  • No sleeping in places where you might end up blocking emergency exit route
  • No blocking toilet routes either
  • No sleeping in places where there are actual people trying to have fun, not jump over someone sleeping on the floor
  • Be sure to fold your sleeping bag, mattress etc. early Saturday morning (you can unfold it back again at night). Summarising, no sleeping facilities should be set up during day.

No showers are available on party premises.

Can I bring my own hardware?

Obviously! It is important to remember though, that we have limited table spots, so please contact us before the party (the sooner the better) so that we can predict the number of tables we need to rent and make reservations for you.

Why are the tickects that expensive? Can’t it be done for free?

We are not planning to make any income out of the event, however if there is any, it will be given away in the prizes.


[email protected]



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