Zombie Gras was one of the Scarezones that takes place at Halloween Horror Nights 20: Twenty Years of Fear. It was located in San Francisco.
This Mardi Gras parade has gone severely off course and the undead walk among us.
Zombie Gras enhanced the storyline of ZombieGeddon. In the house, a sudden power failure causes the zombies' collars that maintain their docility to fail and leads to the ZAP facility being overrun. Upon exiting the facility, you discover the cause: a Mardi Gras parade crashed into the power lines outside the building, allowing the zombies to escape and infect the parade.
- Zombie Knight
- Wounded Jester
- Chainsaw Zombie
- Bead Zombie
- Knight Zombie
- Frog Zombie
- Trombone Zombie
- The background music used in the Zombie Gras scarezone is actually a series of excerpts used from Universal's own Mardi Gras Parade which often runs normally from February to April during Universal's Mardi Gras event each year.
- This is the first scarezone located in San Francisco.