Considering that the blades are essentially a imperial secret police my character wanted to kill them not work for them.
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In Oblivion the Imperials keep you in a prison so bad they don't even bother to remove the dead from the cells.
But in the tutorial mission everybody from the emperor to his guard act like you would gladly do whatever they ask including defending the emperor with your life.
Hardly, i would be more likely to join the assassins at that point.
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In Skyrim
and you still end up working for the Blades ( more or less ).
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Now i understand that we need a group ( faction ) that guilds you thru the story and tells you what to do but why does that group has to be Imperials or their creepy secret police , the blades.
To make it even worse , if you refuse or just kill them you are condemning the entire world and of-course yourself to death.
The irony in this is that some people don't like the Dark Brotherhood because they are "evil" ( but they do treat the player with respect )
while the Imperials end up being the "good guys".

