D3 offers a brief bite of local co-op video for Insect Armageddon, which you can catch after the break.
Local co-op comes in addition to the previously mentioned three-player online campaign mode and a six-player survival battle royale. D3 has also updated the weapon count, doubling the 150 count to 300+ at present, and the suggested retail pricing for the title is currently listed at $39.95 USD for the Xbox 360 and PlayStation 3 when the game releases in the Spring of 2011.