Achievements
Complete each achievement to receive the allotted gamerscore
Alien Ventilation shaft
As the Alien in level 3 the Queen will tell you to get to the bottom of a shaft with a giant fan at the top As you get close to it another Xenomorph will be swept away and blown into the fan If you use your Focus you can see two vents on the opposite wall Choose either of them and you can safely jump to it despite the power of the fan As you go you will find more vents to hide in Use them to make your way down
Finding collectibles
As an Alien or Predator activate your Focus to have collectibles appear as flashes on the HUD
Marine Avoiding instant kills
In multiplayer mode keep your back against walls to prevent getting killed instantly by Aliens or Predators
Unlockable Skins
Reach the indicated Rank to unlock each Skin
