This guy is an absolute madman, to offer his fate of which world he'll end up in with barely any thought to fate. He didn't even look through the available options, just the top 5, before rolling the dice. I could maybe see if there was more consideration before it, but he jumped at the opportunity as soon as he had the idea. Like, what the hell? It's literally his life we're talking about here, and there could have been some truly awful options.
Anyway, besides that, I'm usually not a huge fan of the dungeon mechanics in gamer stories, because they are disjoint from the main plot and actions there have little consequences. However, you mainly use them for off screen training, which is fine. I'm just afraid the character will become ridiculously OP in no time. For the moment, however, there are still people far beyond him, so that's good.
Lastly, I don't really like having powers from other pieces of fiction with relatively little explanation. And the reviews to this story aren't helpful in gauging whether it may be interesting because they just talk about powers from other media.
Anyway, I'm enjoying it so far, but I'm unsure about the future. I like the long chapters, so we'll see how it goes.

Wow, this has been great so far. 'now if you can just do it again this year'. JK.

But seriously this has been a great read so far and i'd like to thank you for giving us an interesting story to read. :)

Power of existence from shakugan no shana is a wide thing but king wouldn't have that long to make his own attacks.
He also doesn't seem like he would be able to really make the most of it.
Well unless you looped it with the unlimited energy to the point he could make a world for himself like the mc.

Maybe the world things from disgaea?
It could allow him to fight stronger enemies based on himself or maybe even skills given the nature of those things.

One of the labyrinth magics from arifureta since those have a lot of potential even though hajime focused on basically one style and never branched out until the epilogue.

Anyways great chapter!
I love the bit with tatsumaki.

Alright. I'll bite.

Saitama is younger than king by 4 years . Saitama is 25 years and king is 29 years. Saitama started training at the age of 21 or 22 . So, According to your story ...king is 14 when he met saitama and saitama is 10 ... wtf? Your timeline is f*cking messed up bro. Saitama didn't train until he met the crab villain and he was already 21 or 22 years old and had a job at that point. What the hell are you doing with this sh*t?

you can try 'HAKI' from one piece.
I would especially love to see King use 'COUNQUERER HAKI' on monsters to fill the place of his 'kings heart'
that thing he does in the anime where his heart starts beating loudly and people think he's getting serious.

Soul ocean from Tales of Demons and Gods. There are ranks bronze, silver, gold, black gold, legend, heavenly fate, heavenly star, heavenly axis, dao of the dragon, and martial ancestor.

Hmmm
Maybe one for all from boku no hero academia or the hiriashin from naruto or fire dragon slayer magic from fairy tail

Stand would be cool but kinda useless for their physical strength but the abilities are cool

Bleach has some interesting powers

Or he could have something Iron Man Armour or something. Nanotech Mecha etc

Fate has some cool powers Mystic eye of death perception reality marble marble phantasm and some of the character has some seriously overpowered ability plus Gate of Babylon is awesome

How about hundred gauntlets from medaka box?

Awesome chapter. Outsider ability suggestions: haki Or 6 powers from one piece. A zanpakto from bleach. the ability of takeover magic from fairy tail. Metamorph from hairy potter. Dying will flame from hit man reborn. An animal companion that grows with him and he can fuse with.

could use DxD senjutsu. it's not that rare but rarer than abilities from Naruto or other huge fandoms.(not that the DxD fandom is small by any measure). Or something like elder blood from the witcher(even if only women have been able to use it to my knowledge)

I accidentally posted the review for the previous four chapters on this one so this'll be the review for chapter 5ish.

I liked this chapter, expanding on tornado's character a bit is nice and I was hoping King would get some action. can't look that badass and not get actiom.. I hope to see more soon, and I'm curious to see in which direction you'll take this.

this is probably my favorite OPM fic so far. I love the gamer, and though having King be strong kind of detracts from his comedic character this is still a pretty good character. solid 8.

How about "rule-(alteration)(commandment)(bender)(control)(negation)(breaker)"?

Aslong as you got a good ending, leaving it at 12 is ok, you got really long chapters