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Solves

Total: 18

Puzzle
18 Off the Beaten Path
17 Sack of Gifts
16 Tidying Up
14 Ice Pack
15 Migratory Birds
13 The Arcade
11 Check It Out!
M Metapuzzle
10 Flipping Channels
9 Overt Infiltration
8 Survival Stories
7 Spy Games
6 September of the Puffins
5 1. e4 e5
4 Subnivean Snake
3 Double-Crossed
2 Metrology Lab
1 Penguin Pidgin