The hunt is over! Thanks so much for solving! Solutions are available for all puzzles. A wrap-up post will be coming in around a week late January.

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Solves

Total: 15

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Puzzle Solve Time
17 Sack of Gifts
12 High-Rise
10 Flipping Channels
15 Migratory Birds
11 Check It Out!
13 The Arcade
8 Survival Stories
14 Ice Pack
7 Spy Games
6 September of the Puffins
5 1. e4 e5
4 Subnivean Snake
3 Double-Crossed
2 Metrology Lab
1 Penguin Pidgin