Tips For Queen
The Queen can be quite a block at first, she's nothing though as long as you got your trusty Rocket lancher- Just side step back and forth using your machine gun for her body guards and the rocket lancher for her, Stay your distance from her, or your end up a smudge on the floor.
Weapon Vs Alien
Flamethrower - Best for facehuggers
Handgun - Best for small aliens
Machinegun - Best for large aliens
Rocket Lancher - Best for the queen