I go by many names throughout all of existence.

  I am all, and all is through me.

  Since I had completed my first achievement in this world, it has been a near infinite amount of years.

  I have existed an uncountably high amount of time longer than anything in existence.

  Time has flowed synonymously with me.

  I am all, and all is through me.

  My journey to being the supreme force commanding all of existence was arduous.

  Unimaginable pain, and unimaginable joy were omnipresent throughout my time.

  I started in my fantasy world, grinding achievements and growing stronger, and becoming the isekai power fantasy hero that I always wanted to be. In that world, all bowed before me and my tremendous power. I had all of the classic titles "Demon Lord" "Great honorable one", "The lord of all" "Level 99999 S class hero". I had done so much.

  It was but a drop in the bucket. I still had more achievements to get. I spent many years in that universe, completing everything that I could. Even all the way back then, I was regarded as being above all. But at that point, I was only the strongest on that planet. There was still more. I needed more.

  My reach would need to increase if I was to complete all achievements. I spent enough time in that "fantasy" world that they were able to catch up to, and then surpass civilization from my home dimension.

  I reached to the starts, trying to extend my power to the whole universe to complete all achievements.

  Achievements like "Create a city on another planet" were the start, and eventually I was able to reach even higher. Even completing achievements like "Create a civilization from nothing in the event horizon of a black hole".

  At that point, I was regarded as a supreme force across many civilizations. I had since abandoned my humanity, my form was everchanging.

  After a certain point, I was controlling any and all things that were happening in the universe.

  I then moved to the multiverse. Something that was previously just an abstract concept to me, was now reality. Through controlling the universe I was in, I was able to then access other instances of life.

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  They soon fell to me. There were many concepts and realities that were foreign to me, but all came with time. Time was my greatest weapon. I had all the power, and power brought me time.

  I was now extended through the multiverse, stretching beyond all.

  Checking my achievement list, I had already completed an incomprehensible amount, but I wasn't done. I needed to complete them all.

  There would be no stone left unturned in my journey towards completion.

  The list was still long. It seemed that whoever had created the game created the perfect system for me to dominate.

  It still would be a while until I would reach the point I am at now. So long. So long.

  After I had dominated the entire universe, controlling and affecting everything in it, I felt empty. There was seemingly nothing left to do, and the rest of the achievements made no sense, I literally could not interpret what they even consisted of.

  There was only one last achievement that I understood.

  "Transend"

  I had no idea what this meant. I spent a long time using the entire universe as a resource until I figured it out. I would have to transcend dimensions, ascending from the third dimension.

  It took all I had to leave the third dimension behind, but I was able to do it, to enter into the fourth dimension.

  From there, I was worth less than dirt in the fourth dimension. My journey to the top of the new universe would be even more difficult.

  Yet I proceeded. After ascending dimensionality, I was able to reach a higher level of comprehending, resulting in the achievements that were previously not being intelligible to me were now intelligible.

  The grind still awaited me. The concept of the achievements and the game menu were the only thing tying me down to my previous life.

  At this point, my existence as a human was insignificant.

  I kept reaching higher and higher, ascending into more and more dimensionalities. Fourth dimension, sixth dimension, the thousandth dimension. It didn't matter, I kept ascending and descending.

  I even descended down to being two dimensional and then one dimensional to complete certain achievements.

  "Create a trade route spanning multiple universes in the second dimension"

  "Start a company in the first dimension"

  These were some of the quests that I had to complete.

  The real struggle was going below that.

  The concept of negative dimensions were revealed to me.

  I went down to the negative third dimension and beyond.

  Eventually, after an incomprehensible amount of time, I was able to complete all of the achievements available in every single dimension in every iteration throughout the multiverse.

  I was the true completionist, I had completed them all, all of the acheivements. I was now on par with the force that could combat me. The maker of the achievements.

  There was one other concept, that of secret achievements. These weren't in the achievement list, and I didn't know how many there. They ranged from simple things, like back in the fantasy universe being things like "Find the Secret room in the Goblin Kings mansion".

  I had completed an uncountable amount of these as well.

  I was now all, and all was through me.

  When I met the achievement creator, I just had one question.

  "Did I do it all?" I asked

  "No. You missed one." The creator said with a slight giggle.

  "What?????" My rage at this statement was guess what, infinitely large.

  "What is it???" I asked.

  "You have one final secret mission to complete them all. It's painfully simple." The creator said.

  "Tell me." I demanded.

  "All you need to do, is die to a level one green slime." The creator said finally.