Original: Realizing that this will unleash the Aliens on Earth, Ripley, the mercenaries, Wren, a marine named DiStephano (Raymond Cruz), and a surviving Alien host, Purvis (Leland Orser), attempt to escape on the Betty and destroy the Auriga.
Simplified: Knowing that this will free the aliens on Earth, Ripley, the mercenaries, Wren, a surviving marine named DiStephano, and a surviving alien host, Purvis, set out to escape on the Betty and then destroy the Auriga.