My Mystery Party

Daunting Diamond Thievery: Mystery Party Game

Name: Daunting Diamond Thievery: Mystery Party Game
Brand: My Mystery Party
SKU: DOOM2
Price: 41.95 USD
Availability: InStock

In stock

4.6 10 reviews

Available for download at checkout

$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 players available 16 Suspects (Expansion Pack Sold Separately)
Difficulty rating Moderate, 5/10
Character roles Co-Ed or All-Female (see Host Character List Below)
Interactive Extras Diamond Egg Graphic for the Finale Hunt (Optional)
Game Duration 2 to 4 Hours Average (Flexible Timeline)
Game format Heirloom Thievery| Guided Clue Mingling | 4 Rounds
Vibe and Content Notes Stolen Item Vibes* High Society Intrigue * Clean Scandals
Date of publication 2009. Last Revised: 2025

This old-mansion mystery is packed with high-society intrigue, family scandals, fractured relationships, a notorious chemist, and the disappearance of a priceless diamond-encrusted pterodactyl egg.

This is the instant download version, so there is nothing to ship and no shipping fee. Simply download, print, prepare, and play!

Prefer a professionally prepared game? Choose the Boxed Kit version, and our staff will professionally print and prepare the game materials for you.

Boxed version of The Daunting Diamond Thievery at Doom Mansion mystery party game

Helpful Links:

Expansion Pack: Adds 6 Characters
Sold separately.
Free Player Pre-Game Website
Players can get started before the party with costume suggestions, the game trailer, character information, and more.

Watch The Daunting Diamond Thievery at Doom Mansion mystery party game trailer

Non-Murder 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. Dr. Doom has lived a troublesome life filled with misery, scandal, fractured relationships, and deceitful practices.

In an unexpected change of heart, the notorious scientist has decided to host a grand dinner party at the Old Doom Mansion. The purpose of the gathering is to repair broken relationships with former friends, associates, and loved ones who have been wronged over the years. The evening promises elegant dining, thrilling party games, captivating conversations, and more than a few uncomfortable reunions. The anticipated highlight of the event will be the unveiling of the legendary diamond-encrusted pterodactyl egg, a priceless Doom family heirloom surrounded by fame and controversy.

Unfortunately, where Dr. Doom goes, drama is rarely far behind.

You have received an invitation to the gathering at the Old Doom Mansion. Will the evening bring reconciliation, or will the priceless family treasure become the target of a daring thief? This is where your story begins.

The Daunting Diamond Thievery at Doom Mansion mystery party Pinterest board

Browse mysterious mansion décor, elegant dinner-party inspiration, detective props, dramatic costume ideas, and more on the Pinterest board!

This is the instant download version of the game. Simply download, print, and prepare everything you need to play, with no shipping fees or delivery wait.

PDF files included:

Host Instructions
Printable Game Materials
Solution
Optional Extras, such as the free invitation

For the boxed kit, also called the Party Pack, use the link provided on the product page.

Printing Tips

For the best results, open and print the files using Adobe Acrobat Reader, available free from Adobe.com. Other PDF viewers may alter fonts, spacing, colors, page sizing, or interactive features.

Download the PDF files to your computer and note where you save them before opening or printing.
Select Actual Size or 100% Scale unless the instructions specify otherwise.
Do not select Fit to Page, as this may resize cards, labels, or other game materials.
Confirm that the paper size is set to US Letter, 8.5 × 11 inches.
Print one test page before printing the complete game.
Use standard printer paper for any worksheets or investigation sheets.
Use heavier paper for invitations, clue cards, and other materials that will be handled during the game.
Print in color when possible for the intended appearance.
Do not select double-sided printing.
Allow ink to dry completely before cutting, folding, or assembling the materials.

Printer settings and results may vary by printer.

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.

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.

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!

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").

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.

1 2

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

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.

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.

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!

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").

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.

1 2

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Daunting Diamond Thievery: Mystery Party Game

Helpful Links:

Non-Murder Mystery Party Game Synopsis:

Customer Reviews

Host Character List, Game Preview & Free Resources

Customer Reviews

Video Trailer

My Mystery Party LLC