*image copyright Tripwire Interactive

The Ultra Gorefast (a.k.a. Player Gorefast, Alpha Gorefast) is a playable zed character in the Versus Survival mode, serving as an enemy of the Human squad. He can spawn in during any wave, and can be assumed by all 6 players of the Zed Team simultaneously.
He poses a high threat due to his immortality and ability to ripple through spacetime when near the player.

*artist's depiction

The player assuming the Ultra Gorefast can run at any time, which isn't supposed to happen.
While travelling, the Ultra Gorefast can change directions up to 70 times per frame on a dime, without losing any acceleration.
Since they can spawn in during the boss round, the player who assumes control of the Patriarch only needs to hide behind the Ultra Gorefast to survive.

• Hold GRENADE while spawning to minimize chance of becoming a Husk or a Crawler, since they pale in comparison.
  
• Once you spawn as the Ultra Gorefast, locate the nearest player and run around them while repeatedly attacking to remove them from the game.
  
• When running at player, hold BASH to spin + win.
  
• Press ADS without running to leap forward with a heavy attack. High crit chance.
  
• Most of his other attacks can't be interrupted so don't use them.

• Avoid engaging the Ultra Gorefast alone if possible.
  
• Have your teammates available to focus fire one of these Zeds at a time, since they are essentially Scrakes (many suspect the health variable for the 2 were swapped)
  
• Don't bother hard-aiming at them since they embody the wind and have invincible heads.
  
• If you have to engage several of them at once do consider surrendering.

• The Ultra Gorefast appeared in the first known example of a tale featuring a deus ex machina, as the deus ex machina.
  
• He could kill any player with an arm behind his back, which is saying a lot since he only has one.
  
• When a Clot grabs the player, they panic because they are afraid an Ultra Gorefast will get them.
  
• The Gorefast's design is based off of a mutilated Q.
  
• Underneath his layer of muscle is another layer of muscle, and underneath that you will find the Andromeda galaxy.
  
• Every day is leg day for the Ultra Gorefast.
  
• Ultra Gorefast has the ability to have any ability. He can only use 3 abilities however because Tripwire felt like adding more would confuse casual players.
  
• His endowment is 17,485" long, which he keeps seperate from his body in 4 of his 17 luxury mansions. He lost most of his skin when it was removed.
  
• Donald Trump commissioned its creation to be used as a solid mass for barricading the US-Mexico border.
  
• There have been few sightings of a "dead" Ultra Gorefast, though it is likely that the corpse was fabricated using a regular Gorefast and some blue paint.
  
• An Ultra Gorefast desires nothing, for divinity is hell in the minds of the living.
  
• Whenever an Ultra Gorefast's health gets low, another server times out.
  
• He can crush rapε whistles with his mind.

Sources from: opinion from a few hours of VS Survival; original research
Disclaimer: Obviously, you should not take this too seriously
(Which is what TWI tells their devs everyday)