I think I might have what you need, but can you give me a bit more info of what you were thinking of? I wrote some collision code some time ago that would allow you to accurately perform 2D collision detection for entity vs. entity interactions and entity vs. square tile map interactions. It was written in Ansi C code so I would have to do a little tinkering to get it working in Gamestudio, but it works perfectly as long as you don't use it for anything other than those two things I mentioned above.