Daunting Diamond Thievery: Mystery Party Game

Available for download at checkout
Regular price $41.95
Product details
  • Type Download
  • SKU DOOM2
  • Age Range 13 to Adult
  • Minimum # of Players 7 Suspects
  • Max Players (Main Game) 10 Suspects
  • Max # Available (Sold Separately) 16 Suspects
  • Difficulty Rating Moderate, 5/10
  • Roles Co-Ed or All-Female (see Host Character List)
  • Interactive Extras Diamond Egg Graphic for the Finale Hunt (Optional)
  • Game Duration 2 - 4 Hours Average (Flexible)
  • Setting In the luxurious ballroom of Dr. Doom's legendary mansion.
  • Game Format Heirloom Thievery| Guided Clue Mingling | 4 Rounds
  • Vibe & Content Notes Stolen Item Vibes* High Society Intrigue * Clean Scandals
  • Publication Date 2009. Last Revised: 2025

An elegant non-murder mystery party game set during a grand dinner inside the Old Doom Mansion. This clean diamond-heist mystery is packed with high-society intrigue, fractured relationships, suspicious guests, scandal, betrayal, secret motives, a priceless family heirloom, and a finale hunt for the stolen diamond-encrusted pterodactyl egg.

Mystery Party Game Synopsis:

Dr. Doom, the enigmatic heir to the infamous Doom estate, is a chemist renowned—and reviled—for creating dangerous pesticide formulations. His life has been steeped in misery, scandal, and betrayal. Now, in an unexpected turn of events, the notorious scientist is hosting a grand dinner inside the Old Doom Mansion. He aims to mend broken relationships with those he wronged in the past.

The evening promises elegance, mystery, and surprises. Guests are eagerly anticipating the luxurious affair, which will feature exquisite dining, thrilling games, and captivating conversations. However, the night's expected highlight is the unveiling of the legendary diamond-encrusted pterodactyl egg—a priceless Doom family heirloom surrounded by fame and controversy.

Where Dr. Doom goes, drama is never far behind. The mansion will soon fill with suspicious guests, hidden motives, bitter rivalries, and carefully guarded secrets. Your invitation has arrived. Will the evening bring reconciliation, or will the Doom family’s treasured heirloom become the target of a daring thief? This is where your story begins.

Host a Large Group Game:
  • Main Game: 10 unique suspect characters
    • 7 characters are required, and 3 are optional.
    • May be played with a co-ed or all-female group.
    • Includes a finale hunt for the diamond-encrusted pterodactyl egg.
  • Expansion Pack #1: 6 additional unique suspect characters
    • Sold separately.
    • Includes 4 female and 2 gender-flexible roles.
    • All 6 characters are optional and may be added in any combination.
    • Expands the game to 16 unique suspect characters.

Each of the 16 suspect roles is a unique character. There are no expandable teams. This is a non-murder mystery in which the guests investigate the theft of the Doom family’s diamond-encrusted pterodactyl egg.

Host Character List, Game Preview & Free Resources

This game is licensed for personal, private use only. If you plan to use it for any commercial purpose, public event, business, organization, school, fundraiser, church, promotional activity, paid event, or any use that generates revenue or provides a commercial benefit, you must purchase a Commercial License.

Purchase Commercial License
  • 5 stars: 6 (60%)
  • 4 stars: 4 (40%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
C
Cass
Diamond Thievery - Sweet 16

I wanted to host a memorable Sweet 16 party for my introverted daughter who dislikes noisy/chaotic crowded environments. I found the My Mystery Party site and the Doom Mansion mystery. My daughter and her friends loved this game. It was the perfect mix of engagement and fun allowing time for a meal, dessert (birthday cake), presents.

I really liked the pre-arrival texting activity leading up to the party. We created a group chat with her friends and they were responding in character (a little trash talking)
even before they arrived.
This had them engaged, even the ones not in "acting" because the materials for each character made it so easy for the less outgoing to participate confidently.
My husband and I served as the wait staff and I announced each round to keep them on track.
I was worried that with a meal and cake and gifts that this would run over the 3 hours we had planned. We finished and had a little time left over for karaoke.
Now, we could have used all the time and run over if we had rigorously followed every bit of the direction OR done any of the 'extra' activities.
As it was, we had several who got close in their guesses about who done it, but only one confidently chose the correct culprit.
Highly recommend this game and eager to do another.

L
Lisa
Lots of fun

We bought this for my daughter’s 13th birthday party. The girls had fun getting into character, which is really important because it makes the game fun. As the host, the directions were great and definitely review what you need to do before hand. Highly recommend it.

B
Brenda
Played it with the youngest player Age 8 and it was great

Loved the story and the easy to follow instructions for every round. We were pleased to find that it was easy to play. Everyone got into character and some people were confused because the acting was so great!

A
Anonymous
Be prepared for your players to get creative

This. Was. A. Hoot. Our family revealed untold acting chops, and the hilarious trash talking flowed, from the pregame texts and emails to the actual game day. Playing with a couple of tweens, young adults in their twenties and older adults up to age 70 was a fun and unique mix, and this was perfect for a non-Halloween autumn game night - it gave us an extra excuse to dress up. The amount of cutting things out and host/hostess planning was entirely doable (give yourself some time, though - think in terms of a week or two beforehand, if you can), and while this was our first time, we know it will certainly not be the last (especially because we were hardly done with this one before people wanted to know what we were doing "next time").

A
Anonymous
Diamond thievery mystery party

We did this dinner party mystery with our 8 grandchildren ages 11-17. It was nice to have a choice of an event that did not involve a murder. It was a fun evening.

E
Ebone
Gender Reveal Party

I used the Daunting Diamond Thievery Mystery Party for my gender reveal party and everyone had so much fun!! The person who stole the diamond also revealed the gender of my baby to everyone including me :)

S
Sue
Doom Mansion theft mystery

Our friends had a great time getting into costumes and playing their parts. The party was a hit!
My criticisms are few and are meant to help you improve the game: the Digital email invitation was quirky. I typed in the hosts and the character to play, and they became squished partial letters, impossible to read. So, everyone had to contact me to figure it out.
It took quite a while to print out all the clues, name tags, etc. and to put them in envelopes and have them in the right order; good thing I organized well in advance.
The timeline should tell the host to display the pterodactyl egg before it was taken, and tell the host that Mr. Jade finds the ransom note.
The round 3 solutions could have done without the song lyrics and questions. That easily should be an optional game.

A
Anonymous
Easy to use and lots of fun

I'd never hosted one of these games before and this product made it really easy.
My guests and I all had lots of fun and it was all thanks to mymysteryparty.com.
Thanks team.

A
A. Javier O.
Good, but could be better

Overall it was a great purchase, but needed more character development. Overall storyline was good and information was good but lack of additional character traits and information made the clues harder to unearth when going through the dialog.

A
Anonymous
The Daunting Diamond Thievery at the Old Doom Mansion

We had a great time with this party. We did this at a family get together. I was the hostess but also acted a character without knowing the solution. The kit is well put together and can easily be adapted for many different situations. You can make it as simple or elaborate as you would like. Everyone had a wonderful time. I highly recommend this product. If you are hosting and also acting, I recommend a menu that can be prepared in advance if you are planning an actual meal. This will give you more time to mingle with your guests in character. We are already planning on doing another one at our next family get together.