Dungeon Battle Royale ~ Since I Became a Demon King, I Will Aim for World Domination ~


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One day every human on the world suddenly receives a mail claiming to enact the World Salvation Project. Half in doubt Kurosaki Shion, a diligent university student and loner, follows the mail’s instructions, becoming one of a million Demon Kings governing his very own Domain in the new world.

This is a post-apocalyptic story containing many fantasy elements. It is a somewhat dark tale following Shion as he grows while aiming for the unification of the all too sudden new world. It has many game-elements bolstered by strategical thinking while at the same time providing funny moments and romantic encounters.

Associated Names
One entry per line
Dungeon Battle Royale ~ Maou ni Natta node Sekai Touitsu wo Mezaishimasu ~
Related Series
Dungeon Defense (2)
Dungeon Hunter (2)
Omniscient Reader’s Viewpoint (1)
Maou-sama no Machizukuri! ~Saikyou no Danjon wa Kindai Toshi~ (1)
Let’s be an Adventurer! ~Defeating Dungeons with a Skill Board~ (1)
Recommendation Lists
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  4. Fantasy / Isekai
  5. Covid-19 Reading

Latest Release

Date Group Release
03/31/20 Infinite Novel... side story 5
03/24/20 Infinite Novel... side story 3-4
03/17/20 Infinite Novel... side story 2
03/10/20 Infinite Novel... side story 1
03/03/20 Infinite Novel... c34-35
02/25/20 Infinite Novel... c33
02/18/20 Infinite Novel... c32
02/11/20 Infinite Novel... c30-31
02/04/20 Infinite Novel... c29
01/28/20 Infinite Novel... c27-28
01/21/20 Infinite Novel... ss 3-4
01/14/20 Infinite Novel... ss 1-2
01/07/20 Infinite Novel... c25-26
12/31/19 Infinite Novel... c23-24
12/24/19 Infinite Novel... c21-22
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7 Reviews sorted by

New hawlol rated it
July 1, 2020
Status: c52
At least 90% of the novel are system expositions and internal monologues of the MC about said system and it's skills/attributes, where he ponders about all the implications of each option, performs a bunch of number crunching and simulate the consequences.

It gets a little less worse about chap 40+, but it's still bothersome and I got myself skipping a lot of the info dump, specially because they didn't matter in the end. The rest of the story is mostly grinding/farming ppl that invade his dungeon in a boring tell don't... more>> show manner.

The MC lacks personality and is quite boring. We can't sympathise with him since he's either killing tons of 'innocent' ppl invading his dungeon, or treating his minions as expendable pawns even though they have intelligence but no free will.

I'd rather be reading Dungeon Defense, Maou-sama no Machizukuri, or a bunch of other dungeon novels at royalroad that explore this theme far better and with an actual story. <<less
1 Likes · Like Permalink | Report
New Tora21 rated it
June 28, 2020
Status: c279
Alongside lazy dungeon master, this imho is the best dungeon master LN.

The MC is bound by the same rules, same system as the other demon king and thus start in the same starting line as his adversaries. He's not OP at all which I really like. Other than the basic, most of the world system and rules is unknown to everyone. It's like, the character are playing a new game with no tutorial and minimal explanation, let alone faqs (though the author sometimes explain the hidden mechanic of the... more>> world to the reader through end of chapter notes)

The interesting point about this LN is perhaps the setting which enable the reader to guess the endgame of the story. Spoiler just in case

The story takes place in our current world. It's not an isekai. Shion, the MC, is a former Japanese university student who is chosen to be one of the milion demon king. Yes, the demon kings include foreigner from all around the world though until ch 54, he is just on the verge of conquering the city he lived in. From here we know that afterwards the story will progress on national scale and cross into international stage. I wonder what the demon king from north korea going to be...


The pacing and quality of the story is decent, but the length of a chapter is a bit short. If you thought that the novel has progressed so far because of its 270+ chapter then you will be dissapointed.

This is a spoiler far from the current translation

The genre is shifting further from pure dungeon management after 100+ chapter and focused more on territory expansion and recruitment of promising personel. Most of the major battle in later story consisted of Army scale battle with both sides often having similar number or Shion's in disadvantegous position. If you have played rts games like total war series in hard mode, the story will progress to something like that. Including managing his conqured territory and forging alliance with other demon kings.

3 Likes · Like Permalink | Report
Rianorix rated it
January 22, 2020
Status: c250
The MC is reasonable and inteligent enough but not to the point of unrealistic, he is the type that focus more on analysis and planing ahead (probably impact of being economic major undergraduate).

What I really like is that a lot of MC decisions seem good with the amount of information he had at that time then some turn out to be brilliant but some also turn out to be mistake when he got more information.

This novel also show that many conclusions that MC reach, a lot of other people also... more>> arrive at the same conclusion (unlike many novel that seem to treats what MC thinking as something unique and totally innoventive even though it's something that's really simple thus making other character looks dumb)

Other characters also have distinct personality, not just some card board (well the important one anyway lol) enough that you would remember them despite the huge amout of characters.

The setting is interesting and seem fresh enough even though the premise is kind of convolute but no more than other fantasy setting in japanese (like getting send to another world after a car crash, stabbed, etc.) <<less
14 Likes · Like Permalink | Report
ipapotihus rated it
December 18, 2019
Status: c20
Ok not bad.

I love the fact the MC is not a genius or anything.

The focus is on the system, has the MC as not spoke anything since chapter 2.

I can see that changes in the future.

Won't take long to read. Worth a try
6 Likes · Like Permalink | Report
DeirdreH rated it
April 8, 2020
Status: side story 1
This is the best dungeon management I've ever read because only half of the story is about dungeon management. The other half is about imageboard shilling strategies.
5 Likes · Like Permalink | Report
Haruto420 rated it
June 2, 2020
Status: c47
One of the best dungeon defense novels that I've read. The MC is not an edgelord, but he always does his analysis of what will gonna happen, planning, etc. The author gave solid enough reason for the MC to adapt quickly (which is to erase their emotions as a human and the memory of their relatives.). All in all, its a great read.
2 Likes · Like Permalink | Report
hallc rated it
June 19, 2020
Status: --
Definitely top tier when it comes to any dungeon defense novels. The power system for the MC was extremely well thought out. The dungeon masters can evolve from being human into any number of mythical beasts all of which have special conditions which need to be met before one can take any specified route. I'm excited to see more of what this novel turns into.
0 Likes · Like Permalink | Report
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