Here is the full list of all 18 Eggs 1942 achievements.
Operation Egg completed!
You got a 5 crack combo!
You cracked an egg. Wow!
Saving Private Egg completed!
The Egg Invasion completed!
Egg Raid completed!
The Battle for Egg Island completed!
You cracked 100 eggs!
You cracked 500 eggs. That's a big omelette!
You cracked 2,500 eggs. Blimey!
You cracked 5,000 eggs!
You cracked 1,000 eggs!
You got a 15 crack combo!
You got a 25 crack combo!
You got a 50 crack combo!
As a Scout Egg you activated the Speed Shield for over 2 seconds!
As a Scout Egg you activated the Speed Shield for over 5 seconds!
As a Scout Egg you activated the Speed Shield for over 10 seconds!