Here is the full list of all 26 How 2 Escape achievements.
Complete Bunk under 10 minutes
Complete Locomotive under 45 minutes
Find all the coins in the Locomotive
Complete Desk under 35 minutes
Find all the coins in the Desk
Complete Kitchen under 15 minutes
Complete Engine under 20 minutes
Complete Lounge under 20 minutes
Complete the game
Complete the game without using a single clue
Complete Locomotive without using a clue
Complete Locomotive without dying
Complete Desk without using a clue
Complete Desk without dying
Complete Kitchen without using a clue
Complete Kitchen without dying
Complete Engine without using a clue
Complete Engine without dying
Find all the coins in the Engine
Complete Bunk without using a clue
Complete Bunk without dying
Pet the cat
Complete Lounge without using a clue
Complete Lounge without dying
Play a wonderful melody with the piano
Finish the Storage room