It is great fun and the feedback loop of «shoot alien, melee alien, throw
a grenade at alien» is perfectly judged for a first - person shooter.
In the ending that made the final cut, Natalie Portman's Lena appears to win her battle with the
alien doppelgänger she encounters in the weird meteor hole in the lighthouse
at the center of the mysterious «Shimmer,» setting it ablaze with a phosphorous
grenade.