I haven't seen this posted already but there's an amazing looking game in the works for the Vectrex called Robot Arena. It looks like a nice mix between a shooter and Robotron 2084. There's been a gameplay video posted of a beta version and an article written about it (in German, use Google Translate): http://www.vectrex.d...-anspruchsvoll/
I haven't been able to find any more information about the release date or any information/website for the programmer Thomas Sontowski. If anybody has any more updated information on this game, I can't wait to buy a copy!