I honestly have to say, this is one of the few series of games that actually gets better as sequels are released. Everything has been revamped; combat system, exploration, characters, etc while remaining true to what made the first game great. This game IS the game of the year, no questions asked.
Mass effect 2 picks up right where mass effect ended. Bioware stepped their games up on this title. I try to give myself a timeframe on how long I gonna play(3 hours) and I end up playing for 5 hours or until I have a headache. Amazing game is all I can say!!