After writing 600+ chapters, I'm writing a second and final review. By then, the characters and readers understand that Achievement Junkie is simply one world within a multiverse. Yes, I said MULTIVERSE. All stories that I write will be from different worlds in different parts of the audience-dubbed "Quillverse". Some characters and intergalactic knowledge may be hinted at or shared within the many stories, but each world and plot is completely different from the others.
So, if you like an unpredictable, ever-growing world and universe where characters across various stories will meet and "cross-over" to work together and/or face each other, then you're in the right place. And no, you won't technically need to read them in order. You'll be able to read the final culminating story that connects everything without reading any other stories. But you'll be missing out on many hints or call backs, as well the satisfaction of seeing all the other worlds' characters grow and join the intergalactic battle.
At the moment, there are 6 stories guaranteed slots in the Quillverse, with 5 leading up to the giant, final journey to connect everything. I may add more stories to the list leading up to the finale story, but I'm not promising anything apart from the 6 stories that I've already outlined and plotted at the time of writing this review.
Thank you for considering my story, and I hope you find the entertainment you're looking for. Have a high-five.
ヘ( ^o^)ノ\(^_^ )