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
    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!

  • 5
    Excellent Party Pack!

    Posted by Samantha on Jan 28th 2017

    I got this for my husband's 60th birthday. I also bought the expansion pack since we had over 20 guests. It was a BLAST! Everyone had a great time and played their parts well. Once we got into part 1, people started understanding what to do. During part 1 we offered finger food appetizers since we did it as a dinner party. Part 2 we put out sandwiches and chips. Part 3 was birthday cake. Everyone loved it! We are considering doing another theme this summer once our pool lanai extension is complete!

  • 5
    Great to use with a work team for teambuilding!

    Posted by Shelli on Jan 19th 2017

    I am a Customer Service Manager, I used the Sin City Slayer Mystery pack for Customer Service Week with a team of 12 CSR's. They raved it was our BEST Customer Service Week ever! We stretched the mystery out over 5 days. I highly recommend using this for teambuilding for your work teams!

  • 5
    Yippee for this game

    Posted by P.T. on Jan 5th 2017

    It was my turn to host a new year party and I went out on a limb and made my friends do this, hoping for the best. IT WAS A HIT! Now, our friends are making a murder mystery club and doing this once a month! So much fun!

  • 5
    Spectacular Game! Excellent 5/5

    Posted by Rhonda A. from Jersey on May 14th 2016

    I have hosted My Mystery Party games for many years and this one was so challenging, we loved it! The characters were well thought out and great, the mystery was detailed but fair enough - the clues were there - you have to be good to put it together. I can't wait to pick one for Halloween.