Now im too lazy to do this myself but heres an idea
What if in a populated city a sort of lab or hospital got infested by xenomorphs and local city authority locked down the local area. The Falcons are called in to rid them.
Marines land at a sort of “Upper floor landing pad” to try to clear out the bugs while the bug are dug into this upper floor area with half the floor being corrupted by thickened membrane (preventing CAS/Mortar in those areas)
It’ll be a sort of CQC hell with marines and xenos fighting room to room for control of the floor.
Survivors could be a mix between CMB first responders who got trapped on the floor or medical staff who werent able to escape on time.