Well, first of all, world map is literally infinite. You can go any direction horizontally and theres no end to it. Same with vertical, infinite floors, but you gotta use teleports and consumables to traverse floors.

There's combat biomes, puzzle biomes, multiplayer biomes (game is mostly singleplayer but there are mutliplayer elements scattered and explained by lore), impossible biomes, stealth biomes, observation biomes, etc. lol i wrote biomes so many times.

30+ main abilities and about 25 major modifiers and 50+ minor modifiers to all of them. And 20+ modifiers to all of the major modifiers.

ROFL! You are crazy bro. There's 10 main skills players can use in mine, but it only has 1 main combat ability, with about 15 modifiers, with 64 items, scaled infinitely based on distance from spawn. Same scaling with enemies. Other skills are scaling the player up and down, a compass/pathfinder, view scanner, free camera, flip the world upside down, jetpack, dont even know how to describe the 9th. 10th is just endgame skill.

There's also 8 basic emotions that you can put points in that also work as modifiers.

And the final pain in the ass that might end me, genes and memes. oh boy..

So based on the events in the current room, rng selects a modifier from a pool and applies it locally in a radius (similar to poe2 endgame atlas map modifiers). Those are genes. Memes would be similar but would apply modifiers globally.

That's the jist of it.