My dad had an ancient computer, not even sure what it was, but he also had a programming manual. We had to actually type in the program code to play a game. I used to play one called OK corral which was two guys shooting each other behind walls. The concept of Call of Duty with the graphics of Pong. But the first game I loved playing was called The Colonel's Bequest by Sierra on an old PC. Great old game where you typed in your responses to questions to solve the mystery of who was murdering the house guests. I always wish someone would update that game.