During my many travels throughout the internet,
this announcement from Chris Priestly on the Bioware boards.
When is the demo for Mass Effect 3 being released?
The demo for Mass Effect 3 will be released on February 14, 2012. Timing may vary by platform and geographic region.
What platforms will the demo be on?
The demo will be on Xbox 360, PS3 and PC platforms.
Here are the system requirements - I'll just do the recommended Specs:
OS - Windows XP SP3/Vista SP1, Win 7
CPU - 2.4 GHz Intel Core 2 Duo (equivalent AMD CPU)
RAM - 2GB for XP / 4GB RAM for Vista/Win 7
Disc Drive - 1x speed
Hard Drive - 2.5 GB of free space
Video - AMD/ATI Radeon HD 4850 512 MB or greater, NVidia GeForce 9800 GT 512 MB or greater
Sound - DirectX 9.0c compatible
Additional information is that you will need to download Origin (EA's game installer, I think?) to download and play the demo. Other additonal information is that the demo includes two potions of the game.
The single player section includes 2 areas: the opening level featuring the Reaper attack on Earth, and a level further into the game where Shepard travels to an alien home world to seek their assistance in the war effort. This will be approximately 1 to 2 hours of content.
Oh, and ME3 will have multiplayer for all platforms and Kinect for Xbox 360 e.g. voice commands mainly. Also, all six classes in ME3 are available for playing.