Microsoft’s Xbox Live Rewards members will receive free Microsoft Points for playing Halo’s 4 multiplayer. If you decide to invest over 140 hours of multiplayer, you’ll given 600 Microsoft points.
Playing over 70 hours will earn you 300 MS points and over 35 hours will get you 100 MS. If you spend 3000 MS points on Halo content within the Xbox Live Marketplace you will receive 200 points back and spending 1500 points will get you 100 points back. You’ll be given back 800 MS points if you spend over 3000 points and play over 35 hours of multiplayer altogether. The offer is available until the 30th November.