Obviously one of the more time consuming games in the Gameogre's arcade arsenal, as it requires tactics amoung 20, 30, 40, 60 or 100 levels, depending on the mission. Farthest I've made it is around level 30, mission 4. What are your tactics? Mine, I get them to all come from one direction using walls. I block their entrances, then use a few of those fast shooting things(I forgot their name's, but you know what I'm talking about) and just keep on upgrading. For the first 3 missions it's really easy, but after that, you need a new plan. Anyone have a tactic that works for mission 4? Or is it just hit and miss?