Quote Originally Posted by DDD113 View Post
I think it would be cool to have a Boss Wave every handful of waves, and have your buddy join in for that wave. Now I would suggest that the boss be coated in an all out badass red skin, that would be cool
I second this. For boss waves, why not have one big boss ship (With 500 - 100% shield energy and special weaponry) and some minions guarding it?

Also, can you give me a screenshot or a track plan of the Sao Paulo track (If it exists)?