I don't suppose you could rig this to work on RPG maker could you?
Viewing post in Rogue Fantasy Castle comments
In case you didn't figure this out, you can actually slot this into RPG Maker VX Ace without a hitch, as both VXA and this set are drawn in 32x32. For MV/MZ (which are 48x48), you'll probably need a plugin to change the game's default resolution to keep things looking clean, lest you have to upscale these assets by 1.5x, which results in inconsistent pixel sizes.