Some more that I forgot I hadn't shared.
Minecraft, but with finite spherical - or even cubical- worlds/planets. And the important part, instead of building or finding portals to other dimensions, make them work like stargates that connect to other planets. And keep eveyrthing fanyasy based, without the uber complex redstone contraptions and the pseudoindustrial ma hinery that dominates mods.
Fixed camera, tank controls, survival horror game set in medieval/medieval fantasy times. Instead of conquuering the dungeon, you have to escape the dungeon. And your character isn't a killing machine nor a spellcasting blaster. But despite the fantasy based enemies, keep it grounded without going into occult/demonic menaces or killing god. More RE less Silent Hill.
Cat parkour. A bit like Stray, but truly open world rather than puzzle plataforming. Or superheroish game like the Spiderman games, but without spiderman and with heroes based on other power sets based around acrobatics, going around and stuff. Maybe even anime based.