so i tried a game and 15 minutes in i decided to do a gate raid on the entrances to my base...that stopped ALL waves from spawning for the rest of the 30 minutes, yea sure, didn't get that great of a score because waves stopped spawning but i think its an issue that should be brought up because i was hoping doing that would turn it into cross planet assaults, i had difficulty at 6 so i'm not sure if that would have stopped them from happening.