I call bullshit too as a friend of mine also said that you needed to do the nodes at certain levels, yeah they work when you do them on any level you choose too, but he said you had to do the nodes on certain levels, and that you have to get to round 42 for when you do the last part before you get the death machines, he wouldnt say much else as he said he would ge into trouble......
but i call and smell bullshit...
1. Getting to level 42 is very hard with 4 players, and therefor be to hard for gamers. ( well some anyway )
2. On round 42, the death machines would be useless by then, proberly only kill about 3 zombies with the time you have
3. Bullshit all over, still some left on the side of hes lip