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.

 Included: there are four PDF files to download with this game - a host instruction file, printable file, solution key, and an optional free invitation file.  You must use Adobe Reader (free software that you can download at to view the PDF file, as a PDF is an Adobe product.   

Format: this is a traditional, mingling, clue-based game (downloadable version) for in-person groups. For virtually-formatted games that are ideal for video chat platforms, click here.  

Gifting: the standard game license does not allow transfers, so you cannot purchase a download as a gift. For gifts, click here for gift certificates, or use the link below for the boxed version of the game (party pack).  

Five out of ten difficulty. This game was updated on 8/16/21

Helpful Links:

 Host character list

 Free, printable invitation

 Sample game materials

 Murder mystery prop emporium

 12 character, Expansion pack #1 - Purchased separately

 8 character, Expansion pack #2 - Purchased after Expansion pack #1

 Boxed version - My Mystery Party will prepare your party ready kit

 Direct your guests here - the corresponding pre-game site at Your Mystery Party

Murder 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.  

Follow My Mystery Party's board Sin City Slayer: Vegas Murder Mystery Party Game on Pinterest.

If you wish to host this (or any other) game for profit, you will need a commercial license - click here.

Minimum age:
14 years
Difficulty rating:
Moderate, 5/10
Gender of character roles:
Flexible (most players)
# of players:
8-18 players
Expansion pack(s):
12 players, 8 players
Expandable team players:
Expands to 68+ players with teams (including expansion packs)
Date of publication:
2009. Last revised 8/16/21
Game license:
Single, private use. For the game license's Terms and Conditions, see below.


  • 5
    Sin City Slayer

    Posted by Unknown on Dec 17th 2019

    Well organized, easy to follow game. Lots of laughs and tons of fun. I reached out to costumer service a couple times. They were very helpful and always quick to reply to me! We will definitely do this again

  • 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.