The Best Sci Fi game out there. Period.
if you play games because u believe they can change the world ( and not just for time pass) ... Mass Effect 2 is for you :)
Some glorious mentions:
* You really get attached to the characters. and atleast one of them resemble what we are within
* Missions for the various characters are so diverse and wonderful, but equally important.. and the game does not reveal this importance until you reach the suicide mission.
* The last mission will blow you.. this is where you will understand that perhaps coding is not the most important part of game development.. its something called level design.. because this one is the most smashing finale you will ever play. Trust me on this. No spoilers here.
* Many games come up with choices that change the finale. This one does to. But in a more artistic fashion than most other games. The game is an action movie you are living.
* Action is fast paced and non linear. Interactions are wonderful..as is the characteristic of everything Bioware stands for.
I suggest you play this game even if you do not like sci fi and believe in traditional RPGs. It provides a great benchmark to compare games you will play in the future. This is one game you do not want to end.. and its a journey which you will relish as long as you live.
P.S: You get to make love... again !!! LoL BioWare.