The Ur-Quan Masters
One of the greatest space adventure games of all time, this game blends aspects of Action, RPG, Exploration and adventure games hitting a nice sweet spot. Your goal in the game is to help the human race fight the threat of the evil Ur-Quan. The game features 24 unique alien races which you can interact with, each with its own personality.Some of the aliens will help you on your quest and join your alliance while others won't be so cooperative.
Throughout the game you will mine for resources, build ships, fight in space combat, and explore an open ended galaxy. The original game was called Star Control 2. The Ur-Quan masters is a remake of the original with improvements in several areas. This is one of the best games of all time, if you haven't played it...get it now.