Decrunch | retrogaming | demoscene | Wrocław 2-4 june 2017

About event

Decrunch 2117 is a third edition of Wroclaw event that combines the spirit of demoscene with retro computing and gaming.

The party is an opportunity for meeting fellow 8 and 16 bit computer fans 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).

Photo report from previous edition

fot. kosma.moczek

More reports on Decrunch 2016

When and Where?

Event will take place from June 2nd till 4th 2017 in ToTu club at Hubska Street 6 in Wroclaw (just around 600 meters away from main railway station).

This year’s edition consists of three parts:

  • Decrunch Intro - live acts
  • Decrunch Play - widely opened part oriented on retro gaming and computing in convention of unique Polish computer flea markets
  • Decrunch Party - closed Demoscene Party

Main attractions

Decrunch Intro
  • Live music acts
  • Music played with the original retro hardware and instruments
  • "Sztuka przekraczania" - premiere screening of Michał Barański's film about Polish demoscene (PL)
  • more info
Decrunch Play
  • Retro hardware exposition
  • Gaming competitions, played on original hardware (no emulation)
  • more info
Decrunch Party
  • Amiga Tracked Msx
  • Executable Msx
  • Amiga Pixel Gfx
  • Amiga 500 Raytrace
  • Executable Gfx
  • Wild Demo
  • Intro
  • Amiga Demo
  • more info
New competitions!
  • AGA Demo
  • Live Pixel



Dawne Komputery i Gry
Muzeum Historii Komputerów i Informatyki w Katowicach

Media patronage
Portal MMO


Following ticket options are available at Decrunch 2117:
  • free - free admission for children upto 5 years old at Saturday Decrunch Play event (retro computing and gaming part), valid through Saturday until the Decrunch Party starts (scheduled at 18:00).
  • 30PLN - single day ticket for socializing and live act oriented Friday
  • 40PLN - single day ticket for Saturday Decrunch Play event (retro computing and gaming part), valid through Saturday until the Decrunch Party starts (scheduled at 18:00).
  • 75PLN - actual Decrunch 2117 whole-in-one package. Allows you to participate in both Decrunch Play and Decrunch Party parts. Gives you right to vote in competitions and is the only option to enter the Saturday Demoscene part (it is not required for Friday Demoscene oriented events).
  • 100PLN or more - supporter ticket for all-in-one package. All donations will be invested in next editions of Decrunch.
There are no pre-orders available, all tickets are available on the spot.


Decrunch Intro

Friday, June 2nd

  • 13:00 Doors Open
  • 16:00 Opening ceremony
  • 17:00 "Sztuka przekraczania" - premiere screening of Michał Barański's film about Polish demoscene (PL)
  • 18:30 Live acts

Music played with the original retro hardware and electronic musical instruments.


Decrunch Play

Saturday, June 3rd

  • 11:30-12:30 - Stunt Car Racer tournament 9 (Amiga)
  • 12:30-15:00 - Sensible World of Soccer tournament (Amiga)
  • 15:00-16:00 - International Karate (C64) tournament on dance pads

Games and platforms lists are not fixed and are subjects to possible changes if required.

Show tournaments’ rules >>

Decrunch Party

Saturday, June 3rd

  • Deadline:
    • 15:00 msx entries
    • 16:00 all other entries
  • 15:00 Live Pixel - live pixel art competition
  • 16:00 Jakub "argasek" Argasiński - 100% FRIENDSHIP, talk about Polish Amiga demoscene (PL)
  • 17:00 Panel discussion with Polish demoscene groups: Elude, Ghostown and Floppy (PL)
  • 18:00 First compo batch
    • Amiga Tracked Msx
    • Executable Msx
  • 20:30 Second compo batch
    • Amiga Pixel Gfx
    • Amiga 500 Raytrace
    • Executable Gfx
  • 21:30 Third compo batch
    • Wild Demo
    • AGA Demo
    • Intro
    • Amiga Demo

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

Decrunch Endpart

Sunday, June 4th

  • 10:30 - prizegiving and party closing ceremony


Compo machines

Main theme of the event are heydays (golden ages of our beloved computers). Entries should be dedicated to stock configurations.

  • A500
  • 1MB (0,5+0,5)
  • Kickstart 1.3
  • Agnus 8372A
  • Denise 8362
Amiga AGA
  • A1200
  • Blizzard 1260
  • 060/50MHz
  • 64MB Fast RAM
  • Kickstart 3.0
  • 1541, 1541-II, 1541U, UK1541
  • New VIC 8565
  • Single SID
  • 6581 or 8580 - please mark accordingly
Atari 16-bit
  • 1040STF
ATARI 8-bit
  • Atari 800XL
  • 64K RAM
  • Single POKEY
ZX Spectrum
  • ZX Spectrum+
  • 48K
  • AY
Amstrad / Schneider
  • CPC 6128
  • 3,5"

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 2117

Amiga Tracked Music

  • Platform: Amiga 500 1MiB (0,5+0,5 Chip/Fast)
  • Format: Amiga tracker (MOD, DB1.7, OctaMED, AHX etc, for less popular formats, please contact us)
  • Play time: 5 mins max

Executable Music

  • Platform: any 8-16 bit
  • Format: executable file (Amiga executable, PRG etc.)
  • Size limit: 32 KiB (32768 bytes)
  • Max precalc time: 30 sec.
  • Play time: 5 mins max

Amiga Pixel Graphics

  • Original art only (nocopy)
  • Created Pixel Art
  • GFX Chipset: OCS/ECS
  • Format: IFF
  • Entries will be presented in Personal Paint

Executable Graphics

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

Amiga 500 Raytraced Graphics

  • Platform: Amiga 500 1MiB (0,5+0,5 Chip/Fast)
  • Format: IFF
  • project files from software used (must be working on A500 1MB)

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: any 8-16 bit
  • Format: executable file (Amiga executable, PRG etc.)
  • Size limit: 16 KiB (16384 bytes)
  • Play time: 8 mins max

Amiga Demo

  • Platform: Amiga 500 1MiB (0,5+0,5 Chip/Fast)
  • Format: 3.5" floppy(ies) or equivalent ADF images
  • If an entry is AmigaDOS executable file, make sure the floppy is bootable
  • Play time: 8 mins max

AGA Demo

  • Platform: Amiga 1200 + Blizzard 1260 060/50MHz (2MiB Chip + 64MiB Fast)
  • Format: 3.5" floppy(ies) or equivalent ADF images
  • or a CF card with demo installed + lha archive (up to 16MiB)
  • If an entry is AmigaDOS executable file, make sure the floppy is bootable
  • SetPatch v43.6 will be run before demo execution
  • Play time: 8 mins max

Live Pixel

  • Theme for the compo will be announced at the party before the compo starts.
  • Competitors will have an hour to create an entry inspired by the theme on their own (or any available to them) hardware
  • After the competition ends, voting will be enabled in the system
  • Technical requirements:
    • painting software (DPaint, PPaint, Grafx2 or similar software for other platforms)
    • max resolution is 320x256 with 32 color palette
    • usual Pixel Art rules apply (no effects, filters, etc.)

Organizers reserve the rights to join compo categories together in case of insufficient entry number are delivered for any.

In case there are more than one entry for certain platform it is possible that a dedicated competition will be held.

Laptops are allowed only for cross-development purposes.

Remote entries should be sent to [email protected].

Deadline for remote entries is 2.06.2017 23:59.

One entry per person in msx and gfx competitions.

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
  • UK1541
  • GOTEK Cortex or HxC
  • PC2SIO
  • Mega Everdrive

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. Except for the Old Demo competition, entries that have already been presented at other parties are forbidden and will be disqualified.

Please deliver screenshot from your demo or 30 sec. mp3 sample of your music entry (mp3 format). It's not obligatory, but will make your entry easier to identify in the voting system.


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 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 prking 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 just trying to break even at the moment. We are not planning to make any income out of the event, however if there is any, it will be used to organize next editions of Decrunch (hence, Supporter Tickets).



Decrunch Intro

[email protected]

Grzegorz "grxmrx" Murdzek
Decrunch Play

[email protected]

Kuba "wino" Winnicki
Decrunch Party

[email protected]

Remaining orga squad


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