Queen Strain - UPP Bunker,
The Queen is replaced with an UPP Commander and a bunker spawns in a 40x40 tile location around her, all xenos and monkeys on the map are turned into UPP Soldiers.
Queen Strain - Massive Arms
The Queen can throw xenos at marines, if a xeno collides with a marine it does large brute and acid splash damage. The damage is increased the larger the xeno thrown is.
Queen Strain - Inside Agents
All MPs and the Chief MP are xenos in disguise, they have hivemind access and must do everything they can to help the xenos win. A blood test will reveal the MPs have acid blood and are xenomorphs.