While perusing the net, I stumbled across this trailer for the 3DO port of Doom:   (Original upload with presumably better quality)   Sourced from a sales tape meant for retailers, what we have here is early footage of the 3DO port (presumably mid '95, while the port itself released in '96) featuring an unseen new level and a look at the fabled long lost new weapon! Why even the performance looks perfectly stable at a full screen size, but I think we can all agree,