I made a mod using the HPL engine. Can I sell it? September 16, 2020 14:51 Updated No. Any content made on the HPL engines must be non-commercial. Related articles I made a project using the open-source tools from Frictional. Can I sell it? I bought the game on disk / obsolete store. How do I get updates? Can I use Frictional's games for video content? I created merchandise using official content (concept art, in-game logos etc.). Can I sell it? HPL2 Level Editor is too big to fit my screen