Amazon offers Halo 4 for Xbox 360 bundled with a $10 Amazon Instant Video Credit for $39.99 with free shipping. (The credit shows at checkout and will be emailed to you two days after the game ships.) That's tied with our expired mention of this same bundle from five days ago and, assuming you use the credit, the lowest total price we could find now by $13. (For further comparison, we listed the game alone for $5 less three days ago.) Sales tax is added where applicable.