A downloadable game

Buy Now$4.99 USD or more

Psytronik Software proudly presents ORGANISM, an immersive sci-fi arcade action adventure game for the C64 from Trevor Storey & Achim Volkers with atmospheric soundtracks by Saul Cross.  Explore the decks of the doomed transport ship Heracles and try to find a means of escape by finding pass-keys, data disks and terminals that will give you access to other areas on the ship.  Be wary of crew-members that may have been infected by something that is lurking on the ship ...  Something that you must evade or destroy at all costs!

ORGANISM is also available in the following formats for the C64:-

The COLLECTOR'S EDITION is presented in a stunning fully printed glossy box that contains the game on floppy disk, artwork stickers, a deluxe art card, badges, glossy game artwork poster and a printed Heracles deck map.

The PREMIUM PLUS DISK EDITION of the game is presented with full colour double-sided artwork in a clear plastic disk case.

The BUDGET DISK EDITION features a 5.25" floppy disk presented in a full colour glossy disk-sleeve with a glossy disk label and printed instruction booklet.

The C64 TAPE EDITION features the game on cassette tape presented with a glossy full colour double-sided tape inlay.


United transport shipping vehicle 'The Heracles' travels on the edge of known space. It's destination the military station Damocles. It's cargo classified.
When a breach in the cargo containers sends the ship into high alert and the crew are awoken from their hypersleep only horror awaits them in the dark and silent corridors.
Now it's up to you, as a member of the Heracles crew, to investigate what triggered the breach.  As you climb into your UV suit you hear the screams of your crew-mates echoing from deep within the ship.  

· Detailed hi-res graphics
· Huge multi-deck ship to explore
· Atmospheric music
· Immersive movie-style story
· Intro & end sequences
· Terminal hacking sub-game
· SD2IEC compatible
· PAL and NTSC compatible 


Game Design & Graphics by Trevor Storey
Coding by Achim Volkers
Music by Saul Cross
Packaging Artwork by Trevor Storey
Additional packaging design by Jason 'Kenz' Mackenzie


Compatible with THEC64 MINIi!

Note: This release is not endorsed by or officially linked to THEC64 MINI but is fully compatible with the system.

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Rated 4.3 out of 5 stars
(18 total ratings)
AuthorPsytronik Software
Tags8-Bit, alien, Arcade, Horror, scary, Sci-fi, Space


Buy Now$4.99 USD or more

In order to download this game you must purchase it at or above the minimum price of $4.99 USD. You will get access to the following files:

Organism V2.0 (C64) Psytronik Software 748 kB

Development log


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This was such a fun game, and as a huge Alien game I had a great time on it. 

This is the best alien game ever! 

Everything is put together so well! The gameplay is great, the artwork is stunning and the music is breathtaking!

The map that is included in the download is a nice add-on but the the game is so well made that you really don't need it. The radar is the only help you need. Respect for that! 

I still had a graphical glitch when holding down the fire button while waking up infested crewmembers (using version 2 of this game)

I blame the emulator and settings i used... VICE x64 Version 3.5 with jiffyDOS running on an "odroid go advance" using emuelec... 

The crewmember gets hit like three times, vanishes and the upper half of the sprite enters through the top or bottom of the screen. Nothing gamebreaking! You can still kill him ;) it does not always happen! 

This little glitch aside the game is great! Even if you don't love the alien-movies. 

The different difficulty-options and the goal to collect all crewmembers give the game a good replay-value. 

While i would have loved to get the soundtrack as a separate mp3-download they where kind enough to include it on the disk and as a separate prg-file so you can listen to them in that oldschool-jukebox-style... Pretty neat! 

Great value for the small price! 

I love this game but yet I can’t fully understand how to read the radar... no manual!

It's pretty simple really - if something is on the right side of the radar its to your right etc.

Just started playing the game and am really liking it!

This is pretty great! Its like Resident Evil mixed with Alien.

Who did the box art and background images?

Trevor 'Smila' Storey did the box art AND game art. Truly superb work!

Is it possible to include the coverart to the digital purchase as well? I always add my games to my frontend but it stands out as it is the only games missing good quality artwork on the selection screen.

Sure, what size do the images need to be fit the frontend you are using?

800px wide 

OK, I will sort out an 800 x 800 image for you

How can I play this on MacOS I want to buy this so bad 

(1 edit)

Hi, this a Commodore 64 game so you will need a C64 emulator to run it on a mac.  I recommend the VICE emulator which you can download for free here:-  http://vice-emu.sourceforge.net/macosx.html

Awesome game I have just completed it with the help o some self made maps lol this was the most fun I have had playing a game in a long time 

I got a code at the end of the game what does that mean ? 


The code is for the end sequence which you need to load separately from the disk image.

I know this post was 1year old however I just completed the game again and got the code for the ending and have no idea how to load the seperately from disk image sorry would you be able to tell me how to do so... I use Vice emulator. 

The end sequence can be found in the .prg folder in the download bundle.   Select FILE and then choose Autostart disk/tape image in VICE. Now point it to Organism end file in the .prg folder and the end sequence will load and run, prompting you to enter the code you received at the end of the game.