The Mystery Game 121 was available from September 24th, 2012 until October 1st, 2012. The Steam Mystery Game cost Cash-icon 16 cash per dart Mystery Game Dart-icon. If the player found all 6 regular items, they were rewarded with a bonus 7th item (the Steam Owl).

Steam Theme
Steam Pegacorn-icon
Steam Pegacorn
Steampunk Mansion-icon
Steampunk Mansion
Steam Horse-icon
Steam Horse
Steam Deer-icon
Steam Deer
Mechanical Rooster-icon
Mechanical Rooster
Steam Sheep-icon
Steam Sheep
Steam Owl-icon
Steam Owl

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