Portal 2 is an amazing, unique game and is the only exception so far for the "sequel's always worse the first" rule at first the game seems easy and later on begins to get seriously hard not to mention the amazing clues it gives to its players about it's unique and deep lore also the co-op campaign takes the dark humour and mixes it with fun cartoon comedy, overall portal 2 is absolutely 100% AWESOME and good for the brain especially developing ones like children so if you're stopping your kid from playing it you might want to think twice!