“A Tron clone in 3D.
This has been the tagline of Armagetron, since, well, a very long time, and is probably the shortest and most accurate description possible.”.

“Tron was an arcade game based on the movie of the same name, released by Disney in 1982.
The player uses a left/right joystick to control a Light Cycle which leaves a wall behind it wherever the cycle it goes, turning only at 90 degree angles.
The player must then get the AI to crash into their wall while avoiding hitting the AI’s own wall themselves.”.