The 12 Days of Doomas!

Snow is falling, reindeer are flying, arch-viles are doing that bubbly gurgle noise thing they do, and the fourth installment of the Pineapple Under the Sea Monthly Speedmapping Series has left a very nice gift under a tree near you! 15 uniquely wrapped 10 sectored gifts are here and waiting for you to rip and tear open this Doommas! Unfortunately for you, there are also 75 arch-viles under the tree. Guess you shouldn't have been such a naughty kid this year, huh.