Xbox Live Rewards scheme is offering Microsoft Points to those who put in time with Halo 4â€™s multiplayer.
If you play for over 35 hours you will be rewarded with 100 MSP, while playing for over 70 hours nets you 300 MSP and 140 hours offers up 600 MSP.
In addition to this you can also get refunds for MSP spent on Halo 4 content. Dish out 1500 MSP and youâ€™ll get 100 MSP back, while spending 3000 MSP will earn back 200 MSP.
You can also get 800 MSP back by spending over 3000 MSP on Halo 4 content and playing over 35 hours of multiplayer combined.
The offer runs until November 30th, for all Microsoft Rewards members.
Source - xbox360ach