The gameplay engine and controls are fairly intuitive, if not generic; "A" to run, "Right Trigger" to shoot, "Left Trigger" to aim. So far so blah. It's a tried and true formula, so this certainly isn't a problem, but then you'll start to encounter some weird mechanics that'll throw you off even 30+ hours in. The seldom used "Back" button fires a frisbee-like grenade that finds it's way to your determined aiming zone through ever changing aerial curves that will more-often-than-not just hit the wall you're using for cover. The "Right Bumper" brings up your "Powers", which you'll forget even exist past the first mission unless you choose the "Biotic" class. You'll encounter several glitches, rendering issues and AI imperfections throughout. But that doesn't matter. Because this game is so damned fun to play, and I cannot fully explain why. As ever-conscious you are in free roam of clunky game-mechanics, the moment you encounter enemies, these petty gripes just disappear and you are one with the game and it's protagonist; everything just clicks. In this respect, the best analogy I can draw is playing Donkey Konga for the first time. You're sitting there, dozily clicking through the roster of awful songs, wondering when "Wave of Mutilation" will show up and save this poorly-sourced playlist. You finally settle on "99 Red Balloons", draw a deep breath, and have the most fun you will probably ever experience in this lifetime.
The other dominant gaming aspect is the dialogue engine. Mass Effect was a demi-revolution in interactive story-telling due to it's multiple choice speech mechanic, with clear boundaries between pure and brash responses. It's such a simple system, but it works so well in delivering the intended impact on the player. I'll try and do it justice in this example:
Towards the beginning of the game, the protagonist is always able to talk his way out of any sticky situation, merely by constantly choosing the kind and fair dialogue options; conveniently placed on the top of the dialogue wheel and sometimes even highlighted in blue. Because of this, you are lured into a false sense of security and overconfidence. This continues to the point where you will frequently hold the thumbstick bound northwestern and simply mash "A". Suddenly you near the end of the penultimate mission. You stand between two portions of a base complex, your best friends Ashley and Kaiden are on separate sides, both in grave danger. It is made very clear to you that if you do not assist them, they will die. But of course, they are a good distance away from you in opposite directions; you can only save one. Up comes the little dialogue box. Two options-Save Ashley and Save Kaiden appear on the left and right hand sides-no up or down, no clear divide between moral or immoral, just the option of who will live, and who will die.
If this were at the beginning of the game, you wouldn't think anything of it, but through 10 hours of building up friendships with these people, this decision becomes far more emotionally straining. That build up is what separates the emotional impact of someone getting stomped on during an establishing shot in Godzilla, from Steve Buscemi's heart attack at the end of The Big Lebowski; that's why the story and dialogue of this game is so revolutionary. Even Seth Green's character, who comes across as a totally ignorant twat jerks a tear towards the end.
Because of the sheer amount of content in this game -almost 7 gigs- in the way of linear missions, side-quests and free-roam worlds, the graphics and programming underwent an understandable tune-down, as no engine exists at this time that can fully optimise any amount of data higher than this to run smoothly on consoles. This is unfortunately the largest disappointment in the game, as vast planets and their alien races are brilliantly designed but are shamed by hollow-looking character rigs, shocking lip-synch, and environments that can take anything up to 15 seconds to render. That said, it still retains some pretty decent audio quality, with some sterling voice acting and a working soundtrack. It's nothing on the scores of Halo or Metroid, but it does the job no less.
So, my overall thoughts. Mass Effect is a brilliant game, which has warranted, redeemed, and indeed surpassed it's value many times over, accumulating 50+ hours and counting of my time. Stunning replay value in the way of achievements and alternative storylines etc, but somewhat lacking visually.
A predictable 9/10 from me, an average gamer.