My very first game purchase. The game of choice back then was Civilization II. When I read a preview for Alpha Centauri in an magazine I was stoked! The screenshots looked amazing (they were stills from the wonder videos).
I saved up and on the day of release I bought the game at my local store. The box was heavy. A really beefy manual, tech tree poster etc.
Sadly the graphics couldn't live up to the preview but the gameplay was above and beyond. Its my favourite game of all time and I still boot it up at least once a year.