Matpat's palace
It'd be a huge multistage game store with themed rooms, comic books he never actually read (but read summaries of, obviously) and games he never played on all the shelves. As you go up, it's like the nine circles of hell from Inferno--it only gets worse as you go up. It starts with FNAF, eventually you hit Dark Souls, and at the end Persona. His treasure is a Gold Play Button.
Claim Your Waifu!
I, Pastel_Chaos, pledge allegiance to Grimm from Hollow Knight, my husbando until the end of time. I will protect, nurture, and love him, for it is my duty to stay honorable and satisfy the anime gods, as a weeabo. And let it be known that neither bad localization, nor sub-standard Internet connections, nor the fact that he is fictional, will keep me from him. My love for Grimm shall bond us forevermore.