Also save on Call of Duty titles on Steam.
If you're at a loose end this weekend then you might want to head to steam and join the Call of Duty: Black Ops Free Multiplayer Weekend. You can play all the way up until Sunday evening.
In addition Steam is offering 50 per cent off Call of Duty titles (excluding Modern Warfare 3 pre-purchase) and 33 per cent off Call of Duty: Black Ops.
And if you fancy pre-ordering Call of Duty: Modern Warfare 3 you'll receive a copy of Call of Duty 4: Modern Warfare.
More info over on Steam.