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Duorail

Solves

Total: 15

Puzzle
1 Penguin Pidgin
20 Go Fish
18 Off the Beaten Path
19 Those Crafty Penguins
16 Tidying Up
14 Ice Pack
13 The Arcade
11 Check It Out!
3 Double-Crossed
10 Flipping Channels
7 Spy Games
8 Survival Stories
5 1. e4 e5
4 Subnivean Snake
2 Metrology Lab