Here is the full list of all 42 There's No Dinosaurs achievements.
Found 10% of all available dinosaurs
Found 25% of all available dinosaurs
Found 50% of all available dinosaurs
Found 75% of all available dinosaurs
Found all the available dinosaurs
Beat the game on Easy difficulty
Beat the game on Normal difficulty
Beat the game on Hard difficulty
Beat the Pool level
Beat the Funfair level
Beat the Museum level
Beat the Office level
Beat the Bathroom level
Beat the Train Station level
Beat the Knight Tournament level
Beat the Inn level
Beat the Beach level
Find your first dinosaur
Find 25 dinousaurs
Find 50 dinousaurs
Find 100 dinousaurs
Find 250 dinousaurs
Find 500 dinousaurs
Find 1000 dinousaurs
Find every dinosaur at the Pool
Find every dinosaur at the Funfair
Find every dinosaur at the Museum
Find every dinosaur at the Office
Find every dinosaur in the Bathroom
Find every dinosaur at the Train Station
Find every dinosaur at the Knight Tournament
Find every dinosaur at the Inn
Find every dinosaur at the Beach
Find half of all the dinosaurs at the Pool
Find half of all the dinosaurs at the Funfair
Find half of all the dinosaurs at the Museum
Find half of all the dinosaurs at the Office
Find half of all the dinosaurs in the Bathroom
Find half of all the dinosaurs at the Station
Find half of all the dinosaurs at the Tournament
Find half of all the dinosaurs at the Inn
Find half of all the dinosaurs at the Beach