Roll up, roll up, for the carnival of carnage that is Killing Floor's Summer Sideshow. The eviscerating event has returned until July 23 with five new weapons, a new fairground map 'Hellride,' and, of course, more murderous carnival freaks. Steam will automatically download the free update.

Once again, Killing Floor has been overrun with twisted sword-swallowers, chainsaw-wielding monkeys, vomit-spewing clowns, Siamese twins, and other mutated monstrosities. Fortunately, you have guns and swords. More guns now, in fact, now that the five weapons from the community-made IJC Pack are now officially part of the game, having been rebalanced a little.

The 16 Sideshow Steam achievements are back, unlocking the Steampunk Mr. Foster character if you get them all, along with 9 new achievements. Tripwire has also released four new characters in the Urban Nightmare DLC pack. If you have more money than sense, you can also pay $5 for the money-spewing Harold Lott, based on 80s comedy character Loadsamoney.

Hit Tripwire's Summer Sideshow page for more information. Look, a monkey!