Tripwire has done it again, another great "seasonal" event starts June 30 and will continue until July 22. This time it's a Circus theme, and it's going to be one hell of a ride! It will follow suit with the Christmas event, meaning that all the Specimen will be re-skinned with wonderfully crafted Circus themed looks, there will be 13 new achievements, one new map, and if you unlock 10 of the 13 new achievements you will be awarded with the new "SteamPunk Mr. Foster" skin!
Here's a link detailing the new update!
Also to go along with the new update, TripwireInteractive has released some new avatars for your gaming pleasure. They can be found here!