Here is the full list of all 21 Jacob Jones and the Bigfoot Mystery : Episode 1 achievements.
Complete Episode 1
Earn maximum merits for Episode 1
Complete 'Circuit Training' in less than 9 moves
Complete 20 puzzles
Collect all Gnatgobblers
Collect all soda cans
Complete 'That Ain't Sitting Right' in less than 13 moves
Reach the Airfield
Complete 'A Note of Friendship' in less than 6 moves
Meet a Bigfoot
Earn 40000 merits
Complete 10 Puzzles
Survive the First Night in camp
Complete 'Rolling Blunder' in less than 27 moves
Collect 40 soda cans
Complete 'Log Jam' in less than 12 moves
Complete 'Pack Mentality' in less than 9 moves
Collect 3 Gnatgobblers
Complete 5 puzzles
Earn 10000 merits
Complete your first puzzle