Xbox Live members now have access to the following Alien themed XBLA games this week:
Zeno Clash Ultimate Edition - 800 Microsoft Points
Aliens vs Predator Swarm Map Pack - 400 Microsoft Points
Alien Breed Episode 1 - 400 Microsoft points
Galaga Legions - 400 Microsoft Points
These offers will expire on the 6th September 2010.
Also on this weeks Xbox Live Arcade title will be Dead Rising: Case Zero for a mere 400 MSP.