None? Not one?

There are tons of crossovers out there. But there's not one for the Don't Escape or Deep Sleep series. Those were some interesting (if a bit hard to figure out at times) games, so I find that a bit puzzling. Back in the day they were flash games, but they've since been ported to STEAM.
I guess that means that the basic idea of it is prime material to rip-off and use here.....assuming I can work up the motivation and inspiration to do so.