Fight as a Xen alien grunt through the great levels of Half-Life: Chronicles: Episode One plus a Xen training course...
A very nice mod that puts you in the shoes of an Alien grunt as he and his friends assault black mesa!
You use the hornet gun and a melee attack throughout and you regain health and armor by consuming fallen enemies, bot parasitic aliens and humans such as grunts or security guards. It's very different and it works surprisingly well, forcing the player to be very aggressive when assaulting the enemy instead of falling back for supplies.
It's quite short, and many of the levels have been ripped from the Half-life Chronicles, however, this mod should not be overlooked for it's main character, combat and game-play. :)