Sin City Slayer casino murder mystery

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A Las Vegas casino murder mystery party game for 8-18 guests, ages 14+. This is an in-person game that is formatted to play face-to-face. For virtually-formatted games, click here. Get ready for a hilarious celebrity-themed murder mystery party game set in glamorous Las Vegas! With both expansion packs, this game is expandable to 38 unique players and up to 53+ with the additional expandable paparazzi player (see the expansion pack #1 for details).This is the instant download version of the game - you'll have everything needed to play instantly upon purchase. No shipping fees, no waiting! For the party ready pack, click on the link below in the helpful links section.

You will receive a host instruction file, printable file, solution file and a free invitation that may be accessed below under 'helpful links.' 

Five out of ten difficulty.

Game updated 8/16/21

Helpful Links:

Click here to view the character list!

Click here for the 12 character expansion pack #1 (must be played before expansion pack #2 is added)

Click here for the 8 character expansion pack#2

Click here for the free, printable invitation!

Click here to view the sample game materials

Click here for the Party Ready Pack - have My Mystery Party staff prepare your game kit!

Click here to check out the Murder Mystery Prop Emporium! 

Direct your guests to the corresponding site at 'Your Mystery Party'

Mystery Synopsis

The most highly anticipated VIP party in Las Vegas is almost here! The Cosmo Casino & Resort is set to host a world class soiree for celebrities, news media, and a few Vegas locals that were lucky enough to score tickets. Some of the most prominent figures of our time will be in attendance and this will certainly be a night to remember. However, there is a situation. The city of Las Vegas has been terrorized by a serial killer with an MO of attending VIP events held on the strip. The killer, known as the Sin City Slayer, chooses victims from unsuspecting party guests. The Las Vegas police are currently working with federal agencies to catch this deranged predator. Hopefully, the killer doesn’t have a ticket to this event. This is where your story begins.

How to Host a Large Party

  • 18 unique players from the main game.
  • 12 unique players from expansion pack #1 (purchased separately)
  • 8 unique players from expansion pack #2 (purchased separately)
  • Up to 15 paparazzi expandable duplicate players to play with Reagan Paratzy (expansion pack #1, purchased separately)
  • Up to 15 Monster Muggies Cast member expandable duplicate players to play with Logan Mack (expansion pack #2, purchased separately).

The expandable players are not unique story lines, but rather are supporting players for Reagan Paratzy & Logan Mack. They will, however, have duplicate clue cards each round, they mingle each round like everybody else, and they still guess whodunit. The only difference is that they will not have a unique story line. These players are great for shy/reserved players, last minute RSVPs &/or adult guests who may consume a few too many cocktails.

If you wish to host this (or any other) game for profit, you will need a commercial license or provide us with your 501C number for a charity fundraiser - click here.   
Follow My Mystery Party's board Sin City Slayer: Vegas Murder Mystery Party Game on Pinterest.
Minimum age:
14 years
# of players:
8-18 players
Expansion pack:
12 players, 8 players
Expands to 68+ players with teams (including expansion packs)
Gender of players:
Flexible (most players)


  • 4
    So much fun!

    Posted by Nicole on Dec 2nd 2019

    Everything was laid out great! We had 38 guests so we purchased both expansion packs. Everyone had a blast and really got into character. Only thing is since this game expands so big it would have been great if there were more "required" characters, but still AWESOME!

  • 5

    Posted by Aaron on Oct 24th 2019

    Really great experience. PDFs given were very straightforward. Would most likely purchase additional on another occasion or recommend to others.

  • 5
    Fun and entertaining

    Posted by Unknown on Jul 15th 2019

    This was a fun Murder Mystery! We decorated the whole house like a casino. When guests arrived we took a Polaroid picture of each individual and had them pin the photo up on a bulletin board next to their character name. The bulletin board was a great reference so everyone knew who's who. We didn't do any of the mini-games and still had a blast. No one guessed the murderer in the end. It wasn't very obvious but this was still a very fun event.

  • 5
    FUN was had!

    Posted by Kristin on Mar 25th 2019

    We had a really great time. Everything came together really well. The Vegas themed party was easy for people to dress in costume, everyone got into character!

  • 5
    New Years Eve party

    Posted by Laurie on Dec 2nd 2018

    I ordered this for our New Year's Eve party. We did one last year and our friends are still talking about what a great time they had. Can't wait to do a Vegas theme. Product is very easy to follow along with and suggestions for games and food. Will continue to come back for future mystery dinner games.

  • 5
    Engagement Party Pleaser

    Posted by Tamara on Aug 11th 2018

    We decided to have our engagement party as a murder mystery. We ended up using the 2nd expansion as well, with about 25 people involved. It was so good to see everyone remain in character and play the game. Since this was our first murder mystery we were able to see what we would change for next time. With so many people, we should have allowed for a lot more time in between rounds. When it came time to guess the killer, no one actually got it, so kudos to the actual killer for being so sneaky. Overall a fantastic evening.

  • 5
    Awesome party!

    Posted by Paul McBryde on May 7th 2018

    Everything went smoothly and we had a great time. People really took on their personas and did their own background research, which was fun.

  • 5
    Awesome Party

    Posted by Crystal Sims on Apr 17th 2018

    We had a great time with the Sin City Slayer murder mystery party. We had 10 teenage girls and they had a blast. They all showed up in full costume and really acted out their parts. Only one girl solved the mystery but that was cool too because it wasn't too easy.

  • 5
    Fabulous fun!

    Posted by Unknown on Mar 10th 2018

    We bought this for my birthday with the expansion pack since we had 26 people. Everyone really got into it, dressed in costume and most stayed in character for the whole evening. We did a potluck and just snacked through the whole evening, had cake and read the who done it. People are still talking about this night and what fun it was!