Ok, I'll start the story line...
On a distant planet owned by the Weyland Yutani Corporation a power outage let free the contained Xenomorphs who freed their Queen and killed most of the scientists, but the scientists who did survive fled outside of the lab into the vast jungle where they made easy prey.
After the Xenomorphs and Xenomorph Queen had cleared the lab they left and headed out into the jungle to kill the remaining humans,but Scar stayed back at the lab and fed on the dead humans.
Meanwhile two lone Yutajas landed on the planet both reading that Xenos were roaming around free. Both Yutaja landed and prepared for battle ready to kill anything in their path.