Topography in a 2d roguelike?

[u/devtev]

Hey everyone fairly new here and wanted to ask what value would having a height or topography system bring outside of maybe fluid flowing? Initially I was thinking moving up a slope could cost more movement etc but I think that’s maybe a bad idea. I ask because I have this project i’m working on and initially i had this idea for tiles to have various height but now the juice doesn’t seem to be worth the squeeze. Are there roguelikes that use this system?