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...


  • The 30 floor tower awaits you, its layout generated anew each game.
  • Over 195 different demons to recruit and summon as allies.
  • More than 880 different abilities you and your demon allies can learn.
  • Rich, detailed in-game descriptions drawn from real world mythology for each demon.

10/26/2021 Update Highlights

  • The time has finally come: the Tower's final floor is open and awaits Summoners who have the determination to see their quest for power through to its conclusion!
  • Seven new heroes and seven new unique demons await to challenge those who can reach them in the new endgame areas. Other new demons accompany them as well.
  • Geminimax did a pass on his older character sprites, making significant improvements and updates to many of them. Thank you Geminimax!
  • Ontoclasm provided new art for status effects to add to his UI icon set. Thank you Ontoclasm!
  • A few other bug fixes and tweaks are also included.



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_5_23_2022_PC_Build.zip 15 MB
Demon_5_23_2022_Mac_Build.zip 20 MB
Demon_5_23_2022_Linux_Build.zip 35 MB

Development log


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Posted the 5/22 build, which makes some AI improvements, as well as a few balance changes and text improvements. :) Enjoy!

Posted the 2/24 build, which fixes a nasty lock up bug that happens if you have the Item Sense upgrade and fully explore Tower:30. Cheers!

Amazing game Ferret! Was wondering if you planned to put it up on Steam at all at some point? I definitely wouldn't mind double dipping on this game

Thank you! :D Unfortunately, a Steam release is not planned at this time, but I appreciate you wanting to see it there. :)

It's been ages since I played. Is there a way to adjust the window size?
I know I can alt+enter to force fullscreen, but that's rather ugly. I was thinking more in a sense of keeping the scale, just fitting more on screen.

Try pressing F11 while in the main dungeon view: this is a different full screen method Demon uses that sometimes works better, depending on your system.

Hmm, that seems to just add a black frame around the game to make it full screen (as in the UI doesn't move to the edges, etc.). I guess it's somewhat better than stretching at least.

btw. love the game, even though I'm dogshit at it. Still kinda miss the time when each relic got different abilities and you picked two elements.. I get why it was changed, but it gave you so many starting options.

Hmm... well, boo. :( I admit resolution management in general hasn't been a strong point of mine, but I happen to be in the neighborhood looking into a different issue, so I will see if I can figure out anything better this time.

I'm glad you love the game though. :D And yeah, the old starts did have a lot of options but... oof. Many players didn't even feel like they needed to add abilities to their summoner until Tower:10+. I liked the choice of it and tried to preserve that somewhat when I ended up having to nerf it, but the starters definitely had to come down in power more than a bit.

Regarding fullscreen, I was thinking something along the lines of UI always being in corner/edges and the UI/Tiles size being constant, just when you make the window bigger/full more tiles fit. Kind how the itch.io app behaves when you resize the window - everything stays the same size, you can just fit less/more.
But I assume this type of flexibility is not easy, especially without existing framework.

I cant seem to be able to make it go full screen in any way

What OS are you playing on?

Hey folks. :) Posted a small update with a few minor bug fixes. :D Enjoy!

Uploaded a small fix to a bug with the lore display for two of the new characters. :) Enjoy!

The Tower's final floor is here! Download the new build and you can finally complete your journey to the top of the Tower where you must face the ultimate trials in order to escape. Enjoy, and good luck in the Tower!

Posted another update with a tiny fix to the Friction Burn ability. Enjoy, and good luck in the Tower!

Pushed a small update with some minor bug fixes. :) Feel free to grab it once you finish your current 5/31 run. Good luck!

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The new build is out! Ontoclasm's icon set has been expanded to include art for Brands, over 90 new abilities have been distributed throughout the Tower, and 4 new types of modifiers that can generate new and surprising ability combinations have been added. Additionally, a major pass was done on abilities on existing demons, with many receiving new abilities (especially those later in the Tower.) Some good bug fixes and improvements as well, including a performance improvement for player parties using Aura abilities. Enjoy, and good luck in the Tower!

Posted a small update with some balance tweaks and new item icons for the Ontoclasm icon set! Enjoy, and good luck in the Tower!

The new build is out! An amazing new icon set created by Ontoclasm (https://ontoclasm.itch.io/) has been added, and a significant balance pass focused on cooldown abilities and Relic Upgrades has been completed. Enjoy, and good luck in the Tower!

Don't get toooo excited, this recent update is just a small number of bug fixes. :) Will be starting on the next major update soon though. :D

The new build is out! Three more floors have been added to the Tower, including well over a dozen new demons and close to fifty new abilities. If you're still trying to reach the top, don't worry: you can run into the new demons and abilities in lower floors too, as out of depth encounters or abilities granted by demon modifiers. Enjoy, and good luck in the Tower!

Posted an updated build that fixes a nasty bug with the Great Healer passive. A new content build will also be coming fairly soon(tm), but the bug was nasty enough I wanted to push out an immediate fix.

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So I picked this up on a whim hearing about how it's similar to Megaten and I immediately loved it, but what it really did was introduce me to roguelikes in general, so thanks for that.

You can really tell that there's care but into this, I've been playing for a few months now and plan to play many more. Keep it up boss!

Thank you! I'm glad you've enjoyed Demon and I'm even happier it served as an intro to roguelikes for you: I'm not sure I've heard of Demon being anyone's intro to the genre before this, but I'm glad it is able to be a good ambassador, so to speak.

I'm currently working on the next update, so there's more coming, no worries on that point. :)

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just got this game, i heard of it a while ago, but just decided to download it. Its really fun! very unique too. A small problem i have is just the the window is a bit too big for my screen, idk if youre working on that or not, but if not, it can wait as its still very much playable. If there is a setting that i missed, let me know. but this game is great, i hope you keep working on it and and keep it amazing! 

Hey, and thanks for playing Demon! As a workaround to your issue, try pressing F11 once you are in the main game (can see the dungeon on screen, no other prompts) to switch to full screen mode and see if that is any help.

For a real fix, I may need a bit information about your system: press F5 in game (same conditions as F11) and please tell me what it says, as well as what OS you are running Demon on.


Ah thanks, F11 works great, and for F5 i got "Demon thinks your desktop has a resolution of 1366x768, and is currently running a resolution of 1080x720 (1366x768 in fullscreen). The camera is rendering an area defined by (x:0.00 (107.00 in fullscreen, y:0.00, width:1080.00 (1152.00 in fullscreen), height:720.00 (768.00 in fullscreen)):11.25 (12 in fullscreen)". I am running this on Windows 10.

Oh, and have you considered making a discord server?

It looks like Demon is doing the best it can with the resolution you've got, but 720 is as small as it can go on the Y axis. :( If F11 is working happily, my recommendation would be to continue using that; it is unlikely Demon will support window sizes smaller than Nx720 in the near future.

Demon doesn't have its own Discord, but we do have a channel on the roguelikes Discord. :D This link should be a valid invite for it: https://discord.com/invite/HVBmg7 

New build released! The new build includes several quality of life improvements to the UI that I hope you'll all enjoy. Next up: Tower floors 27 through 29! Until then, good luck in the Tower!

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.

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