Atari 2600, 600xl ... C64 ...yup.
I have no idea what it was called, but in highschool the computers in our Typing class had some network game on it. You moved Ascii characters around an arena with random walls and tried to shoot the other players. I can't remember what it was called, and I can't quite remember if it as Apple or PC, all I remember is they had dual-floppy disk drives.
Probably the main reason I spend all my spare time playing CoD and BF today.