A downloadable game for Windows, macOS, and Linux

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Development Blog:

Discussion Forum: http://forum.ferretdev.org/


In Demon, you play as a Summoner who has donned one of several relics capable of binding and summoning demons. But in return, each relic compels its bearer to enter a mysterious tower from which no Summoners seem to return...

Starting with only a few meager powers and a weak demon ally bound to your relic, you must climb the tower, recruiting stronger demons and learning new skills in order to survive.

Though each relic is powerful, they still have limits: They only allow you to command - not directly control - the demons you encounter, and the powers you can acquire from these allies will never eclipse those of the mightiest demons within the tower. Without powerful, well-chosen allies and clever use of the abilities learned from them, there will be no chance of survival...


(specifics on content amounts reflect current content as of 3/1/2020, not final goals)

  • The 26 floor tower awaits you, its layout generated anew each game.
  • Over 160 different demons to recruit and summon as allies.
  • More than 740 different abilities you and your demon allies can learn.
  • Rich, detailed in-game descriptions drawn from real world mythology for each demon.

3/1/2020 Update Highlights

  • The Tower grows! Three new floors have been added to the Tower's upper reaches, bringing the total height to twenty six floors.
  • The new floors are home to a new Sanctum, over a dozen new demons, and over 40 new abilities.
  • Some of these new demons and abilities can also be found earlier in the Tower as well...
  • Also includes some small quality of life improvements to UI related to Brands and auto-explore, as well as a few other polish items and bug fixes.

System Requirements

Demon runs on Windows 7 SP1+, Mac OS X 10.11+, and Ubuntu 12.04+. 


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Click download now to get access to the following files:

Demon_3_2_2020_PC_Build.zip 14 MB
Demon_3_2_2020_Mac_Build.zip 19 MB
Demon_3_2_2020_Linux_Build.zip 34 MB

Development log


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The game is a gem. Congratulations for such a good work, keep better.

Thank you, I'm glad you're enjoying it. :) There is still more to come, no worries on that. :D

I added a new Readme file to the 3/2/2020 Mac version download that gives instructions on how to get it running on Catalina. I will continue to investigate the issue on my end in hopes of finding a fix I can provide rather than asking players to fix it on their end. Thank you for your patience, and good luck in the Tower!

Posted a quick update (3/2 version) that fixes a bug with Hecate not having the proper inherent Modifier. Cheers!

The 3/1 build is out! Climb to the Tower's new 24th-26th floors, encountering over a dozen new demons and over forty new abilities!

P.S.: Beware the Thrones!

Hey, just wanted to say i think this is a fantastic game, i like seeing the updates it has gotten, it's really well made and i like how you've done it. Hope to see many lovely new updates and hope you have a great day :)

Thank you, I'm glad you like i! I'm working on the next update as we speak. :D

I look forward to it :)

The 10/27 build containing the point-based Upgrade system and new starter demons has been released! With many Upgrades now cheaper than before, there should be new and interesting possibilities available for upgrading your Relic.

Also worthy of the mention: the Titan's Fist Relic's starting Upgrades now provide a way to play with little or no summoning. Demons will still be necessary for success with such a build, but as teachers and Soul Armor / Consume sacrifices more than active participants in combat.

Cheers, and good luck in the Tower!

It's been a long time, but a new build is finally up, introducing Soul Brands to the game. Soul Brands are more or less Demon's answer to equipment: randomly generated items that can be applied to characters to provide various bonuses (and sometimes, penalties or restrictions.)

There's a whole lot more to this feature than I can really fit in a comment though. Go read the change list above, or download the game and explore it yourself to get the complete picture.

Cheers, and good luck in the Tower!

great addition 10/10

:D I'm glad you like it!

New build is up. :D Nothing too exciting, just a bug fix build, but I wanted to go ahead and release these fixes before starting on the next major update. Cheers!

A great and unconventional roguelike that is challenging even to well-prepared players.

 In one of my first playthroughs I got to Anomaly:3 with a score of 4307, and ended up getting defeated by the summoner in there, which not only has proffessional strategy, fully upgraded monsters and powerful healing abilities, but also is at higher level at the player.

Anyway, my attempt to to get resistances from the will o' wisp at the cost of 9K was a bad move. 

:D Thank you, and I'm glad you're enjoying Demon. :) Paracelsus is a pretty tough fight, but it's impressive you got to him at all on one of your first playthroughs: the Anomaly itself is a nasty bit of work, long feared by even veteran players. :D Good luck on your future adventures in the Tower!

In fact, I consider it not much harder than any other bonus location, if you plan your actions carefully. For comparison, being assaulted by a group of ogres in Arcadia or hordes of MaxHP draining enemies in Turdak's Sanctrum is a much more terrifying sight.

Also, I've finally defeated him :D

Just for the sake of doing it, since it's easy to grab all stuff on the floor without putting up a serious fight with him.

This time I've fully assembled my strategy just in time, and focused on draining his mana with my ice attacks. He did spawn with weaker minions this time, and I ended up only moderately wounded.

:D Congrats! I don't know that I've seen someone use Ice SP-draining on him before, but I can definitely see how it'd help, and you usually can get all the pieces by the time you run into him.

But don't worry, the Tower's got plenty of other scary stuff waiting for you. :D

New build is released! Demon Preservation and revamped character creation are now available, and some of the previous restrictions on party composition and resistances have been removed. Enjoy!

New build is up. :D The 9/30 build improves fullscreen support (particularly on Linux systems) and provides other bug fixes and quality of life improves. Enjoy!

Whoops. Uploaded 9/1/2018_b to fix a small bug with a few modifiers having misplaced abilities.

New builds posted! Enjoy experimenting with all the new abilities, and good luck in the Tower!

Thanks for the update.

No proper fullscreen yet, i see (still stretched), sadly.

That's the task for the very next build, already in progress. :D

Hey folks. :) Just released a small update that adds multiple save slot support: you can now have eight different games in progress at once. Cheers!

Why can I not download via itch.io app? it says not available on windows.

Whoops! I forgot to check the little boxes to indicate which file is for which OS, apologies! Should be fixed now.

I'm very grateful for your quick response! Thank you!

No problem. :) Good luck in the Tower!

The 5/13 builds fix a small bug that caused enemy summoners to sometimes spawn with only one demon summoned. Cheers!

Whew! It's been a long haul, but the Matter build has finally been released! The new Matter element, fully fleshed out by the addition of over 80 new abilities and nearly 20 new demons awaits you in the Tower! Good luck!

Are you still working on this? I played it quite some time, and I really like it !

I am! :D It's just been going slower since I became employed full time again. :D I usually post on my devblog much more than here, you can follow what's going on there: http://demon.ferretdev.org/devblog/

Small bug fix build released that addresses a bug with AI healers sometimes failing to heal the player properly,  a bug I did not want hanging around until the next full build to be sure. Enjoy!

New build released! This one is mostly bug fixes and clean up, but it does also include the beginnings of expanding the commands available to demons, including the ability to only order demons with aggressive abilities to focus fire (rather than the old method, which also made your healing and buffing demons move in to attack.) Enjoy!


Is it possible to play this at full screen, even with black borders to fill the space i don't mind, but i dislike having a floating window on my screen ?

Any 2x zoom somewhere ?

I only played less than one hour but it seem quite interesting, so far, and the GUI is well done.

I'm on Linux if it matters.

Hi, and thanks for trying Demon! I'm glad you're finding it interesting!

You should be able to enter full screen mode using F11 once you're in the main game (dungeon view.) Unfortunately, there is not a zoom mode at the moment however. 

Let me know if I can answer any other questions, and thanks again :D

Ah yes, F11 is going full in main game, not in menus. Issue is it's going fully fullscreen, so it's stretched because common screen size have different ratio than your game's window one (1920x1080 seems to be about 60% of the players choice in 2017, more or less depending on sources). Any way to add black borders to fit any ratio and keep the game pretty ?

Hmm... I'll look into that and see what I can do. Thank you for letting me know there's an issue with it!

Hi, any news on this ?

Ah, sorry! I didn't catch this all the way down here: Itch doesn't seem to notify me about replies apparently. :( I only finally happened to glance down past the top of the list and see this one just now.

This issue is still on the bug fix list, but with apologies, I don't have an ETA on a fix at the moment. It's not a crash/data loss sort of bug; those are usually the only ones I interrupt the build schedule for (especially when things are moving slowly, as they are at the moment since I've been slammed at work since July.)

I apologize again for what probably isn't a satisfying (and is definitely a late) answer. The best I can tell you is that I haven't forgotten about it (indeed, it has been reported a second time by another user a couple of week ago.) and will fix it when time permits.

Ooof. Well, maybe THIS will be the last bug fix build for the 6/24 release. Fixed bugs with Poison+ and Poison++ and the Inner Fire ability.

6/25b fixes another, different, but equally vexing lock-up bug. Apologies for the rough release everyone!

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Whoops. :) Small hang-up bug that snuck into 6/24. Fixed in 6/25. :D

New build released, including a whole pile of UI improvements and bug fixes, most notably icon-based status effect displays to make it easier to keep track of what's going on in combat. Enjoy!

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Hey, small question, how are you generating seeds for each map/playthrough?
if its name and ability based then attempts can be shared right?

Also recorded attempt number 2, https://www.youtube.com/watch?v=IgOOq_ypaxs&t=25s

Demon doesn't have a seed sharing setup at the moment, unfortunately. :(

I saw the video this morning, but didn't have time to watch before work. I will check it out tonight when I get home though. :D Thank you again for posting these. :)

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Just uploading and sorting life out though, will be recording a few attempts over a few months :3

Will/Have you considered making starting relics/ablilities unlockable rather then everything available in the beginning?

Oh, awesome. :D I always love seeing LPs of Demon! If they're on YouTube, I can link them on the devblog too. But, the video you linked is currently private :P

Re: Unlockable relics, I've thought about it a little! If I did do unlockables with the starter relics, I'd probably handle it like the Demonic Compendium: you'd have the option of just playing with everything, whether you had them unlocked or not, or you could run it with just what you'd unlocked. :) I'm usually in the "I want all the gameplay options now" camp myself, but I know there are definitely folks who like unlock-based systems too, because it makes things simpler for them while they're still learning by reducing the options that need to be considered, because it gives other goals to shoot for during gameplay, or both.

Ok attempt is now public and sorted, youtube was being funny about the video. Are there more demons or just those in available at the start plus trait ones? Also redcaps are so hateful and never seem worth recuiting.

Cool! :D I'll check it out when I get home tonight!

In the current version, there are over 110 different recruitable demons (this does not include variants due to random traits that can modify them.) Red Caps are a bit tough to convince to join you, but their free action self Accuracy buff and early ranged attack (even if it is only throwing rocks) are kinda handy.

Annnndd as is becoming distressingly more common, uploaded a 1/7/2017 build which fixes a moderate-sized bug that prevented enemy demons from spending stat points gained from leveling. :P Apologies for the error, and enjoy!

1/6/2017 build has been released! Enjoy! :D

Uploaded a 12/12/2016 build that fixes a few bugs. :) Apologies for the errors, and good luck in the Tower. :D

12/11/2016 build is live! Enjoy, and good luck!

Happy UI upgrades are happy. :) Enjoy the 10/13/2016 build everyone. :D

9/18/2016 build for ARRP 2016 is released! Enjoy, and good luck in the Tower!

Great to see Demon itch! Congrats, Ferret!

Thanks. :D