Writing Quality: Amazing. There are almost NO grammatical errors from my perspective. (English is my second language so...) Stability of Updates: Really good, 2 chapters of intriguing and extremely interesting chapters a day. Story Development: Sometimes it's fast, sometimes it's slow, depending on the universe Grandpa is in, but I like it! Character Design: Honestly I love 'em all. Especially Grandpa Universe. Gosh, he's so god damn nice it just sometimes makes my heart melt. But, of course, he still knows how to be ruthless when it comes to it. World Background: Although a lot of things change with the involvement of Grandpa, I like every way it has changed up to this point. And a heads up to those that don't like wish fulfillment, cuz this is kind of that. So if you don't like it, don't read it and don't complain about it. But honestly, this is probably my favorite fanfiction of all time. I absolutely love every god damn thing about it, and I sometimes wish that there were more chapters released every day. But, I can't get too greedy, now can I? Either way, all I can say is, I god damn recommend this. It is so good!

Honestly I went into this story with pretty high expectations because of the overwhelmingly good reviews, but it's really nothing much. The MC is already completely overpowered 5 chapters in and the author doesn't even pretend that he has the intention to create any t*nsion at all. He starts out as a genius above Einstein level, with military background and overwhelming wealth even before reincarnation. He then has his comprehensive ability multiplied by a million as well as getting his talent for any future skills maxed out assuring the reader that there will be absolutely no challenges to the MC power fantasy. If that isn't enough he is allowed circumvent even death, through the ability to respawn with zero repercussions, should he mess up despite all the cheats he's already been given. On top of this the story lacks the humor or character exploration necessary to pull of an OP protagonist. But let's be honest I'm a sucker for some good fanfiction and I'd be willing to ignore all these glaring flaws given the ability to revisit all my favourite novel and comic worlds, but the author treats the worlds in a way that completely eliminates their original charm, running around with machine guns in the harry potter world, in a way that reminds me of the "My immortal fanfiction". I'm just disappointed.

What ? You didn't read that novel ? FUCKING DO IT NOW !!! I DIVINE !! THE WRITING QUALITY IS GODLY SAME FOR THE UPTDATES THE STORY DEVLOPEMENT CHARACTER DESIGN *Smack* GODLY THE WORLD BACKGROUND IS GOOD TOO SO STOP WHAT YOUR DOING AND READ IT !!! ... dont stop breath or other things like that please .... HAVE ALL A GOOD DAY NIGHT AND LIFE !! LOVE YOU AUTHOR-SAMA I WANT MOAR !!!

I am at chapter 51. 1. First of all, author made MC an old man who acts like a grandpa, so romance is thrown out of the equation. 2. MC is basically a puppet of God. He is overpowered, yet he has no power to decide his own fate. 3. He can't choose when he would leave the world he is randomly thrown into. As soon as the purity of any world reaches more than 90%, he is thrown out. 4. God just randomly gives MC an identity and past, which takes the whole adventure vibe out of the equation. 5. MC is apparently millions of times smarter than when he was human, yet he is content on being a puppet. 6. MC merely acts as an agent of god, so all the interactions are meaningless because after the world is purified, the only characters left would be God and MC. 7. Since MC is overpowered, there is little to almost no real action. 8. MC can only punish people based on their karmic points. Every moment of his life is controlled by god. MC is basically a slave who can't decide how to live his own life. That is very annoying. No romance. No sense of adventure. No action. Puppet/Slave MC. Unreasonable karma point system. Why would god grant him that position if MC can't even create a cake identity? How does god keep giving him millions if he can't enter the multiverse?

Incredible novel! Looking forward to when he is going to overpowered worlds, like DC or Marvel. And if you send him there you could even explore the universe and other worlds to develop better the story and until now don't see no one going to space in a DC and Marvel fic, that of course if the person is not already in space, but even if he is, they all go to earth.

This Grandpa is just full of damn good moments to carry this story, For all I care gramps can sit and eat sweets and i'll still be invested in his character! And the story, Ohhh the story is even more fulfilling to read. And even better this old man can throw fisticuffs! Bringing the Pain train to town! I can. In full confidence say that this book is entertaining and just oozing with bingeability!

Nothing but the allfather is below him, he makes even the mightiest beings bp Bow down to him, Jesus is his brother who also reincarnated in other world's to take everyone's sins away from Them and put him on his own. This dude, is an amazing Author and a badass grandpa, he is not a manipulative bastard not a goody two shoes hero that likes to stick to the cannon. Author this is one of the most amazing book I have age read. Don't ever drop this book or I will come to your house to find you the you to a chair, and force you to type! Don't even think about putting it on hiatus either!. Anyway, I'll be waiting for more chapters and eagerly awaits the marvel universe where he willbecome higher than the one above all

Really minor spoiler. Like really really minor. I like the whole premise of the story you did a good job with it. The only thing is that he wanted to be a superhero and got over it but it seemed too easy for to just start killing people. Also the mc looks like a modern version of sebas tian from overlord which is pretty cool. The part about sebas tian was what i mainly wanted to say but it looks like i went on a rant.

this is the most creative story ive ever read in my entire life, i would vote right now but im out of power stones. Mister_Immortal you are an excellent and innovative author!!!!!!!!!!😍😍😍❤❤❤🖤🖤🖤💙💙💙💚💚💚💛💛💛🧡🧡🧡💜💜💜😁😁😁🤯🤯🤯💓💓💓💕💕💕💖💖💖💖💗💗💗💝💝💝🎉🎉🎉🎊🎊🎊🤑🤑🤑🤪🤪🤪😜😜😜😀😀😀