Details
- Author
- Stygon
- Status
- Ongoing
- Chapters
- 81
- Rating
- 4.81 / 5
- Last updated
- Nov 2, 2026
- Published on
- Royal Road
Endless Delirium [Grimdark, Dungeon Crawler] (Book 1 Written)
4.81 · 81 chapters · Ongoing · updated Nov 2, 2026
ActionAdventureHorrorMystery ApocalypseDungeon CrawlerDystopiaFirst ContactGameLitGrimdarkLitRPGMagicMale LeadPortal Fantasy / IsekaiProgressionSystem Invasion
Why read this story?
- One of the highest rated stories in the catalogue.
- Actively updating: the last chapter was posted 1 day ago.
- A shorter read at 81 chapters, easier to finish than a long series.
- A good fit if you enjoy Apocalypse, Dungeon Crawler and Dystopia.
- Stygon has 1 other story listed here if you like their writing.
About this story
[Note: By popular request, I’m clarifying that the feather on the cover is a weapon, NOT a quill. This will make more sense at Chapter 2]
The Fifth Integration begins.
Descending upon Earth and the Fifth Universe as a whole, an infantile System attempts to do as it has every time before and bring the inhabitants into line.
Yet, for the first time since the beginning of its history, the System faces not only resistance, but an equal as the Fifth Universe begins to fight back.
Waking up something that should never have been, the System damns many inhabitants of the new universe as they are pulled into the hellish parasitic reality that resided silently beneath their feet all along.
Now trapped in what a strange disembodied voice calls “Floor 0, The Nothing,” Aaron must fight his way free of cannibals, aliens, and what arguably might be called angels, all while battling for control over his body against the corrupting power grafted onto him.
The System sings to him from the skies above.
But the Underworld beckons him into the depths below.
What to expect:
-This is a GRIMDARK! People die horribly and sometimes suffer fates worse than death; the world at large is incredibly brutal, with depictions of sensitive or traumatic topics. Despite that, I won’t just cause pain in the story to cause pain- everything has a time and a place.
-Side characters are mostly safe for Book 1, no point in killing someone nobody cares about.
-Takes inspiration from Dark Souls, Dante's Inferno, and The Backrooms
-Lots of action with a heavy focus on exploration.
-Starts off slow magic-wise to gradually introduce the reader to the power system, so as not to be overwhelming.
-Fast-paced plot-wise for Book 1 to set up a solid foundation for what is to come.
-I try to stick close to reality or a believable outcome, but ultimately will sacrifice believability for a better story if required! A story should be interesting to read.
-MC isn't perfect, but he tries his best in a cruel world.
-Dungeon crawler.
-System Apocalypse, but less focus on Earth itself and more on the effects this had on the wider universe.
-I’m witty in REAL LIFE, I try to write the MC as somewhat awkward but fail horribly. No, his speeches are not power fantasy, that’s how I’d actually react irl. Shocked me the first time I got a complaint that his charisma was unrealistic, my bad.
-Every power has a cost. If it seems like the MC is getting out of paying a cost, we just don't know what it is yet.
The first 15 chapters give a good idea for where the story is going, so if you make it to 15 and like it, then I’d stick around. If you make it to 15 and don’t, it might not be for you.
Endless Delirium [Grimdark, Dungeon Crawler] (Book 1 Written) is published on Royal Road. FicGems only lists the story's details and links to it; the chapters stay on the original site.