Do chests appear randomly, or are they rewarded after you achieve specific things? What achievements? The odd distribution (I've gotten 8 Fire Breather masks, and only one of most of them) hints that it isn't random.
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The ten rings are Infinite Loop, Angel Wings, Twisted Root, Floating
Island, Sky Clasp, Demon Claw, Ruby Shard, Caves Maw, Mystic Rocks,
and Idol's Curse. -
The ten masks are Fire Breather, Infinite Seeker, Traveling Tiki,
Skyward Scream, Serpent's Smile, Silent Menace, Jade Monster, The
Gatekeeper, Demon Skull, and Face of the Idol -
The five Christmas artifacts are Candy Cane, Stocking, Holly,
Present, and Wreath.
Also, have you ever opened more than one chest per run? I ask because all this work to reach Level 10 is making me kill myself after I grab a chest.
Best Answer
I asked support@imangistudios.com the question, and here is their answer.