some tools and documentation on the .rorlvl format for Risk of Rain Returns (very WIP)

• ability to read .rorlvl tile data in Tiled

• saving levels edited in Tiled
• reading/writing object data

included is an extension for Tiled which allows for opening .rorlvl files in the editor

you can get Tiled here

once you've installed Tiled, move the files in this folder to the extensions directory, which by default is here for each platform:

once you've copied over the files, you'll want to extract the sprites from data.win in the game files directory with UndertaleModTool if you haven't already
after that, move that folder (which should be called Export_Sprites) to the extensions folder, and you now should be able to load .rorlvl files in Tiled!
for more information on Tiled, see the manual here

documentation on what i know of the .rorlvl format can be found in rorlvl.md