Soundwave on 25 October 2012
Halo is the crown jewel of the XBox brand, and it's being transferred to a new dev studio for the first time.
This is the most important Halo game since the very first one. If the brand is damaged here, they could lose a lot of the fanbase.
So it's money well spent. It's not MS just investing in one game, they are investing in their lead brand.
