Beginning on January 15 at 17.00 pm GMT and ending on January 18 at 17.00 pm GMT, Left 4 Dead 2's multiplayer will be available to play on Xbox LIVE for free... to Silver members.
With L4D2 being some of the biggest fun you can have in multi-player since, well, Left 4 Dead, it's no surprise that Microsoft is offering up this freebie as a sort of crack-dealing first-hit-for-free to entice Silver members to pay up and go gold.
We'd like to be outraged, but what the hell, it's a great MP game.