Pros:

*Original design
*An epic finale for the series
*Multiple custom baddies and custom events
*Gnome!
*Hard
*Faithful to the space jockeys narrative

Cons:

-Team can get stuck sometimes on the second level and all -die!
-Pushing blocks are sometimes buggy
-Too hard if the team splits up too much

Conclusion:

A great end to the series!  But Challenging !!!  Got the gnome for killing all of the space jockeys in lvl 1 and used it twice in lvl 2.  Just had to throw him on the first arena platform after the first gnome-weapons crate and he will fly to the top.  Look for him at the end of lvl 2 so you can access the second weapon's cache.  Found another easter egg but i won't spoil it lol.  Good work.  I hope you make more!