Best of the old with the freshness of the new
There's no doubt about it - Mass Effect is shaping up to be one of the most epic video game sagas of the recent years. Mass Effect two follows on directly from the original game, and the highly-anticipated third installment will conclude the storyline.
This game is a highly charged-up offering focusing much more on the action and gunplay elements of the Mass Effect system. It keeps the class-based character development but has simplified and refined it greatly: instead of a mess of talents you had to spend points in (some of which were ambiguous to the average gamer) each class now has only a handful, but most of these are cool abilities and their upgrades rather than passive increases.
The Mako is gone, but is has been replaced with something equally tedious - scanning and probing planets for minerals used to upgrade weapons and armor. So there's no more random exploration - instead you just view the planet as a whole, scan it for mineral deposits and click to launch a probe. It's time consuming and quickly gets old, especially on repeat playthroughs.
Aside from this it's a solid space shooter/RPG with terrific continuity from the first game, and all of the original's charms updated into a new system.