Zork was a text only adventure game. NO graphics at all! My first computer was an Atari 800xl, and had 64 kilobytes of memory. It came with a cassette player drive you plugged into it for loading games. It also had a slot to insert game cartridges No disk drive, no USB port, not even a hard drive! It did have a plug for a phon line so you could save your game and send it over the phone to a second player for his turn, and he would send it back for your turn when he finished. And at the time it was a technical marvel. Most of the programs I had were written in Basic!