She's asked to engage in a final showdown with a cast-off from the Hellraiser series called "Nemesis" (obvious to the point of funny), a WWE-sized brute with a nice smile that wields an Israeli helicopter-mounted chain gun with one hand like Jesse Ventura in Predator and moves so slowly that the entire film could have been avoided had Alice done the sensible thing and simply walked in the other direction.
That hulking weapon is Nemesis (imagine the Terminator crossed with one of Clive Barker's "Hellraiser" demons, mega-weapons blazing), and in addition to being a bulletproof monster extraordinaire, he's a tragic link to the first film, best known to gamers as the namesake of "Resident Evil: Nemesis," from which this movie borrows much of its story, characters and imagery.