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Theory of Magic (Arcanum)

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developed by

developed by mathiashjelm

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completed

264 ratings

rated 4.6 stars, 264 ratings.
jsstorytext-basedopen-source

Posted May 22, 2023. Updated May 22, 2023. Played 35612 times for a total of 95776 hours.

description


From a lowly Stable hand, rise to the pinnacle of Arcane Power. Outfit a lair. Learn spells. Explore dungeons and find new classes. Try separate schools of magic and focus on different intricacies of magic along the way.

NOTE: The main developer is lerpinglemur. I am one of the maintainers, who got his permission to post the game here.

This game is open source and found on: gitlab

Also feel free to join us on discord

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newest comments


SINKINGSEAFOAM July 1, 2026
+1comment score: 1
I have spent 17 hours on a character and when I prestiged they got deleted. (they aren’t supposed to be) I don’t know what caused this, it isn’t a huge deal for gameplay but still feels bad. I am not sure why this happened but please be cautious when prestiging and download your save to your files, I was only saving with my browser and having a save downloaded would have allowed me to restore my character. Dont make the same mistake I did.
Cosmos July 1, 2026
+2comment score: 2
I know this game lost its popularity long ago but I just wanted to say: this really is one of the greatest incrementals of all time. Like the prestige tree, groundhog life, and of course the father of all incrementals Cookie Clicker, this spawned its own subgenre of incrementals, which together with the looper genre led to arguably the most loved game on this site; terraformental. I salute this game.
Cosmos May 21, 2026
+2comment score: 2
Love the fact this is still getting updates
Jaded-Distance April 12, 2026
+2comment score: 2
Is there any way to disable the hotkeys bar banner at the bottom? Have a playthrough on mobile phone chrome browser right now, and it's playable for the most part, but that banner cuts off the bottom 20% of the screen and makes some things impossible to click.
incraldanerd oversight March 26, 2026
+1comment score: 1
this game still gets updates? no wonder it feels different today

top comments


Lustre May 22, 2023
+18comment score: 18
This was one of the better ones I've played, just wish it went a little further in depth. Albeit, it does take a while to get to the "end" of the game. You essentially get to a point where there's no more progress and gain resources forever to no end. The part I liked most was that you get to replay the game due to a mechanic and it can be vastly different depending on your choices.
nulledabyss June 28, 2023
+16comment score: 16
Arcanum has always been one of my favorite RPG focused incremental games. There's really nothing out there that offers anything quite like it in the genre, things come close but ultimately have different appeals from Arcanum. So I'd like to thank Lemur, Mathias, Mindedness, and the others that have worked on and maintained this game. 5/5
ArthasLevolos July 18, 2025
+10comment score: 10
Heaven has a special place for devs of good ol incremental browser RPGs, bravo!
prestclu May 25, 2023
+10comment score: 10
I've loved this game for a long time; arcanum / ToM is a rare type of RPG that I wish there was more of. It's really great to see that it's coming to a more accessible location for new players to find. It's a bit of a shame that it isn't being actively developed anymore, because it has so much potential, but the game as it exists today is still a very fun way to spend a few days so it'll always be something that I recommend to others.

sheepandotter June 17, 2025
+5comment score: 5
i love this game so damn much <3

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