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