I searched every Game and Gamestation store for this before release and was told they were all allocated to pre-orders. Since this is my favourite game series I was gutted so you can imagine my surprise when I saw Play had this. Ordered it straight away (think it was one of the last copies!) and it arrived very quickly.
Mass Effect continues the story of Cmdr. Shepard and the invading Reapers. Great story as you would expect and the multiplayer co-op is really good. It's along the same lines as Gears Of War's Horde. 4 players battle it out 11 Waves of human troops, Geth or the Reapers.
Some people are complaining about the ending but it is an end to the trilogy. But, Casey Hudson has revealed that there will be other DLC in the future and something else, but you'll just have to search the net for that info.