Wow, After reading the other responses, I feel like an antique.
The game that got me hooked on gaming was "Mystery House".
It was the first game released by this brand new publisher called Sierra, and we played it on a Apple IIe.
That wasn't the first computer game I ever played though, that honor goes to this space game (Can't remember the name) that we played at my father's computer at the local university.
It had to be loaded from punch cards.