Matt - Like a G Pix, like a, like a G Pix....
This took 26 mins for myself and my buddies over the at The Spartan 1 Project to get this achievement, a new record on that map, which was faster than doing the map with 4 people. The only thing is, is that it didn't give me the achievement, and we waited for a few minutes, than hours, than days, than weeks, and now it's been about a month or two and still no achievement, does anyone know how to fix this? Because it seems like a bug on ODST.