What lost media do you guys think is being suppressed?

I was having a talk with LevelEngine about RSD Game Maker, & I got the feeling that the engine's harsh reputation has probably led many other games made on that MS-DOS engine to be suppressed from ever being preserved. I would assume some of the people known to create games on this engine are suppressing their own games as well. Daniel Turner is a good suspect of this, so is Flip Enterprises(who made a fan-made Kid Icarus game on Flash years later) considering he only talks about the games once, & there are probably so many other people who could be suspects as to who's suppressing games made on this engine, again considering the engine's harsh reputation outside of the rather dormant fanbase(seriously, I'm the only fan of this engine still largely active. The others have seemingly disappeared from the face of the Earth for god knows how long). Perhaps I'm the haters' next target on who to kill, & some of the fans have been killed by the haters. Who the heck knows? It's no wonder why we haven't got any updates on whether, or not Matt Bell managed to recover some of his lost games.

How about you guys? What lost media do you guys think is being suppressed from ever being preserved?