Great map and very challenging in higher rounds. My first attempt i got to round 14, didn't know about the minigun.
My second attempt i got to round 24 with the minigun and then i went at it again and beat it on round 9 with just the pack a punched starter pistol, The Ticker.

Steam ID: TruSpartan, my proof is in my screenshots on my account, but i dont know how to freaking upload them to here