I remember a game but it was for the Amiga. Programmed in German and translated into English. The splash screens were very ST3:TSFS. You could go to the bridge, transporter room, you have a navigation map and could do courier missions or else engage the Klingons. I remember seeing how the animations all worked in the Amiga's graphics package at the time..... It was completely free, but I did have to pay £5 to some mail order bloke who posted it out on a floppy disk!!! Ah, the joys of computing 20 years ago.