After that first mission, Shepherd is made into the first Human Specter, a special class of government police that has a free pass to making justice as they see fit. The idea is to track down Saren, a "rogue Specter" who's after something and is obviously up to no good since "he hates humans" and, as you know, that's the only species you get to play as.

This leads Shepherd around the galaxy in search of Saren, gathering proof against him and eventually to take him down. Through the course of the game, there will be lots and lots of side quests, which can get you extra money, equipment, information, etc. It also happens to be half the fun, to go around the galaxy exploring and finding new things, flying in your own ship.

Team structure is also a prevalent theme, allowing a choice (for the majority of the game) between six different teammates. Two humans, an Asari, a Quarian, a Turian, and the best for last, Wrex the Krogan. It shouldn’t be a surprise that the only species that can be a battlemaster is also the character with the coolest name and most badass attitude. Wrex is a good enough reason to play the game all on his own.

Remember the dialog? Well, just like in most RPG's there are certain things about the way you respond to situations that change your influence. Generally, there are three stances Shepherd can take in any conversation: for, against and neutral. However, there are some times where a different solution might be better, and such dialog is highlighted in red or blue.

These special dialogs are for charm and intimidate. These options allow you, if available, to do just that; either charm whoever you're conversing with to do what you want, or intimidate them into it. And because the way you behave, the missions you take and the way you speak all have influence over what kind of person you become, either Paragon or Renegade (good or bad, respectively).