This giant metal-plated concrete ceiling has a hole in it for trapdoors.
No tips here yet — be the first survivor to leave one.
Leaving tips is for survivors on the rewards list — reserve your rewards with your e-mail once and the form unlocks everywhere.
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Adobe Ceiling 
Adobe Dinosaur Gate 
Adobe Dinosaur Gateway 
Adobe Door 
Adobe Doorframe 
Adobe Double Door 
Adobe Double Doorframe 
Adobe Fence Foundation 
Adobe Fence Support 
Adobe Foundation 
Adobe Hatchframe 
Adobe Ladder