On the Starship Miniatures Gaming FB group someone was discussing using 5150 Fighter Command for Robotech and Starblazers.
The game's primary author has done crossover rules for Star Wars, Battlestar Galactica and Wing Commander:
And I've done rules for the Terran Trade Authority universe:https://sbminisguy.files.wordpress.com/2017/11/5150-fighter-command-terran-trade-authority-rules.pdf
You can get 5150 Fighter Command here: http://twohourwargames.com/51fico.html
And if you want to add extra flavor to your Fighter Command games, check out 5150 Carrier Command which puts you in the role of the commander of a Carrier and all its space fighter assets, adds new rules for electronic warfare, new ships, and more: http://twohourwargames.com/51caco.htmlhttps://sbminisguy.wordpress.com/2018/11/15/using-5150-fighter-command-with-other-universes/
If you have your own cross over rules or home brew for Fighter Command, please post them here!!
Ad Astra Per Aspera!