Either Sierras' Kings Quest or Leisure suit Larry. The latter was totally motivating for a sweaty 12 year old in 1987......
Sierra online basically tought me the english language, and I learned what a profilactic / rubber meant!
I will hopefully be able to loose myself in a living and breathing cyber-city. I hope to spend a lot of time admiring the enviroment and world. I have been waiting for something like this, that can wake the same feelings as when I Read Ghost in the Shell many years ago.