This is one of those ideas that is totally obvious once the enabling technologies are in place. I played a Star Trek themed game on a time-share system around

This is one of those ideas that is totally obvious once the enabling technologies are in place. I played a Star Trek themed game on a time-share system around 1975 or so. Unfortunately I can't pin it down exactly, and I don't know who wrote it. You were shown a map using an ASCII character grid, and there was a sensor display that would give you coordinates to objects of interest in your vicinity. You could shoot either phasers or photon torpedoes at any other player, and the damage they did was inversely proportional to the distance between you and the strength of their shields. The winning strategy was to aim directly at someone, then accelerate and turn yourself 180 degrees, putting all power to the rear shields. Then get out your watch, and time to the second when you would pass them, and fire all you had at their back side once you passed them. No graphical displays, this was done on a Teletype at 10 characters per second!