I would also like to make note of something that nobody has mentioned yet. At the start of the game the Alien team was restricted to semi-auto mainly due to their "respawn" style of just needing to walk away from the battle, wait 30 seconds and go right back in. They did not have to walk all the way back to a "base." Part way through the first chapter they requested that they be allowed to fire full-auto because they were getting destroyed. Both PDF and Marines agreed that they could use full-auto. Just wanted to throw that piece of info out there as well.
