I played a long time ago, I'm pretty sure it was on the C64. It was kind of a space trader (no not elite) where you're in a ship, but you didn't really fly it, and you can buy upgrades and weapons for it, and I remember trading like gems and stuff. There was a screen you interact with other aliens and stuff and if your diplomacy didn't go right or you came across something hostile they'd jam you communications and you'd have to fight, which was basically just firing lasers at their ship in your viewer until one or the other of you lost or gave up, at which point the words "hauling frequencies open.." or the like would scroll up the com screen. The control screen kinda looked like PSI-5, but i don't think that was it. It wasn't any star trek or star wars game either. For the life of me I can't think of the name