When we announced that Microsoft had partnered with Amazon.com to provide Xbox Live Arcade games, we were quite excited.  No longer did we have to buy packs of Microsoft points to get the exact game we wanted.  Now there's another side effect from the deal - Amazon discounts. 

Can't get enough of the game that "redefined underwater action games"?  Well you are in luck!  The folks from Chair Entertainment have announced a brand new expansion pack for their game Undertow on the Xbox Live Arcade.  It features a brand new 5 mission campaign that is playable via co-op.  It also adds a new race, a...