The 150th Mystery Game was available from April 22nd, 2013 until April 29th, 2013. The Asian/Jade Falls themed Mystery Game cost 15 cash per dart. If the player found all 6 regular items, they were rewarded with a bonus 7th item (the Crested Ibis).
Rewards are the same as Mystery Game 99.
During this week players got a free Mystery Game Dart.