then you want to play Frontier, which was the sequel to Elite. It has relativistic combat... and it was shite. You and the enemy ship hurtled towards each other, then past each other with a fraction of a second where they were close enough to hit each other, then turn around for the slow decel, and then repeat all over again. dull.
That only really happened if you left the flight control assistance on in combat.
If you turned this off (with the poorly labeled 'Engines Off' button), it wasn't too hard to keep your opponent at close range.