Some of the achievements are more or less impossible later on the game. Like using Rudolph to end one of the bosses, I didn't get the chance to use one before my minions were too strong to finish off the boss by themselves.
So... After a few more levels, I found out that walking the plank just doesn't suffice anymore. Shoot cannonballs at birds, pirates (who don't die of it...?) and make some sharks very happy!
Did some research... The chinese population in 1850 was on about 450 million. So, if we think that your results probably say around 300 million opium users, it means that more than 2/3 of China were drug addicts. So trying to stop something like this is like trying to stop candy in the modern world.
There's a bug on the last battle. You can't see how many enemies there are, just the types. But if you move your mouse over it, you can see the numbers.
Mhm... Haven't played much, but I think it needs a better overview of your inventory.
And on my first try, I made a guy. Later, I made a new one of same class (with different name), but when Rogan first talks to me "...your name is XXX, right?", he used the name I had for the first character.
Seriously, it's impossible to win if you let that "chosen one" guy preach. They take day offs ALL the time! Why not just jump out to the zombies and get done with it?
 "This is the Only Level 3"){kind=icon}
 "Ultimate Santa Battle"){kind=icon}
 "Corporation Inc."){kind=icon}
 "Paper Pirates"){kind=icon}
 "Frontier"){kind=icon}
 "High Tea"){kind=icon}
 "Long Way"){kind=icon}
 "Moby Dick 2"){kind=icon}
 "Culmination"){kind=icon}
 "Earn to Die"){kind=icon}
 "Legend of the Void"){kind=icon}
 "Pirates of the Undead Sea"){kind=icon}
 "SteamBirds"){kind=icon}
 "Rebuild 2"){kind=icon}