The total amount of aliens to kill is 6,000 good luck. They spawn in groups of about 50-100.
http://www.youtube.com/watch?v=26I2N_nlatg
How to push objects (boxes):
-Walk up to box
-Hold shift and melee the box
-Continue holding shift and move forward
-Profit
Credits: _lycosa
http://www.lycosadesigns.com/
