The pincer tactic

Derfud

<div class="IPBDescription">Cut em' off</div>This was actually a famous tacitc used by the Axis during WW2, they would surround a city and cut off all supplies, and  weaken the opposition, well this could be similar, and could work with both Marines, and Aliens, first of all, set up some turrets along a main hallway, along with some trip mines, have a couple of marines stay with them, then proceed to finding an alternate route and wait for the aliens to come into that main hallway, cut them off from behind, that way they have no direction to run, perhaps if you have them all trapped, it would eb a good oportunity to seige the Hive!